To actually enter the Lucid boss fight, we just have to talk to Protective Mask.
This brings up the boss difficulty selector. For the story battle, there's a unique difficulty called Story. Story mode difficulty is kind of a joke, and the fight itself lasted just over a minute total.
We will not be showcasing this fight on Story difficulty. Instead I'll be running the fight on Normal, where she has around 24 trillion HP.

Uh… isn't that a LOT of HP? I'm not strong enough to deal with that…
That's no problem. I took this footage when Magilia was ~level 257, and we'll just put it here.

But… I'm
not level 257. I'm not even level 240!
Uhhh… oh, I got it. Because this is a dramatically appropriate moment, you're able to borrow power from your future self in order to save the world of now. It's powered by your determination, and is effective because, uh…

Because this is a dream?
Perfect. Let's roll with that.

I'm not sure how I feel about ad-libbing my own existence… but if you're sure it'll work.
When doing actual bosses, there's some preparations that need to happen. Up there in the top right you can see an average buff bar for bossing. I'm not going to get into what all of the various buffs are right now, but suffice it to say we are doped up beyond all recognition on top of having another 20 or so levels on Magilia's current status.
This should let us clear the boss in about 20 minutes, if we play well.
The image from the end last time plays on every single entry into the boss. They have recently added the ability to skip these intros, but this feature is
not implemented in v251, and also came with breaking boss AI patterns to remove their attack cooldowns (which is also, thankfully, not implemented here).

Welcome to my dream, o great
chosen one. Unfortunately, you won't be waking up.

That's what you think! I'll beat you… I have to beat you!

I control everything in this dream. You couldn't stop me any more than you could stop the tides.

Be careful, Angelic Buster.

Don't worry. I have a plan!
Lucid's realm has a requirement of 360 Arcane Force to deal full damage. This means that we actually want 540 AF, or 1.5x the number. Having that will increase our damage by 1.5x, helping a lot with carving through her HP.

Webs?! But those belong to…

It's my dream! I can use whatever power I want!
At the very start of the fight, I begin by going right into my Burst rotation. This is a term I've probably used before, but allow me to explain it more in-depth now.
Every class has a number of skills that increase their damage for a focused period, and these periods of increased damage are called a class's "Burst." Because MapleStory is played by nerds who love spreadsheets, each class also has an optimal way to activate all of their skills to deal the most damage within the Burst's window. This is called a Burst Rotation.
Angelic Buster's Burst Rotation looks like this:
We've got
most of these skills by this point already, though we skip over Grand Finale and the Oz ring. The one downside of this is that so many buffs can take quite a while to get moving, and Lucid isn't going to just stand there and wait for us to activate everything.
MapleStory will eventually go on to add the ability to press one button to speed through a bunch of nondamaging buffs at once, but this feature is
not implemented in v251 so we have to do it the hard way.

Huh… I guess it makes sense that there's a right way to do it…

Look out, Angelic Buster! She's going to attack!
The warning from Protective Mask only comes once for some attacks, and comes every time for other attacks. It's very inconsistent, but this one always means Lucid's going to use the first move we have to watch out for in this fight.
…As she does so, a number of lines of flowers appear. They will explode after a few seconds, and if we're inside of them when they do we take 30% of our max HP in damage. Almost all boss attacks work just like this, and because of that defense and HP are almost completely worthless in bossing. The only thing that matters is if our HP are even or odd: Odd HP can survive two 50% attacks at exactly 1 HP left, while even simply means we're dead.
Anyways, for the actual attack we need to look out for she hovers up and glows blue. Once she's done charging, she releases the attack itself…
And we get incredibly lucky! This attack, usually called 'sickles,' is a number of crescents that fly outward from her place sitting atop her flower. They can fly outward in a number of directions, and she launches quite a few of them. Each one deals 30% damage, and we only get mercy invincibility
from the sickle that hit us. This means that 2-3 of them stacked on top of each other can chomp through our HP in no time at all..
She also summoned those butterflies along the top of the screen, which will spawn the tiny blue bullets that are flying around. Each of those pellets deals 20% damage. If it wasn't already implied from her being a girl and having a hat, Lucid is a bullet hell boss. Our job is to maneuver through the danmaku and beat up Lucid before she can kill us 10 times. Our hitbox is much bigger than in real SHMUP games, but we also can take
many more hits than them to balance this out.

I won't let you finish whatever it is you're doing..!
She also summons golems in groups of 2 (and as the fight proceeds, 3). These golems appear in midair before slamming into the ground, and they block movement past them. They deal 30% HP damage on slamming down and knock the player around. Trying to pass through a golem, or being stuck in it after it lands, deals 70% HP damage. They can be killed, but it takes a few hits due to their HP pool. Basically they just gunk up the area unless they land right on you or you wind up trying to dodge through them, in which case you might be dead.
They have infinite vertical reach, too, so jumping over them isn't an option.

I can't… move..!

Taste the dragony fist of justice and love!
That's fine by me, though, because I finally land Erda Nova. Erda Nova is the common Bind skill, and Binds are very important in bossing. They give me a free 10 seconds to beat on the boss while she can't act herself. In Lucid's case this means the flowers and butterflies will still act, but she can't use her sickles or summon any more golems/do anything else nastier than sit there.
Our Burst lasts for as long as Spotlight does, so it's only 10 seconds out of 30… but the first 10 seconds are when our Sparkle Burst and Mascot attacks go off, so there's a lot of damage compressed there right off.
We're already through her first healthbar. Lucid has 10 of them in each phase, and they're associated with her overarching cleanse mechanic. Each time we drain one, the statues on the far left and right gain one charge, indicated by the yellow dot. These charges are shared, and they can hold a total of 3. We'll get back to what they do when it's more relevant.
When bossing, I track Bind time using the lock symbol up on the top of the screen. Any time a boss is bound, it stays bound for 10 seconds and we can't bind it again for 100 seconds. This means that once that icon is at 90 or below we could start being attacked again. As an Angelic Buster, what I do is wait for the first attack that could realistically cause me a problem…
It's my time now!
…And hit Sparkle Burst again. This gives us 10 seconds of invincibility, meaning for 20 out of the 30 seconds of our Burst we functionally don't have to care about what Lucid is doing. Because of this, Angelic Buster is considered a relatively safe class to burst with in bossing.
As we finish our first Burst Rotation, Lucid's down to 81% of her starting health. That's not bad for a minute of work, but Angelic Buster is also a class that can't rely entirely on her safe bursts to bring down bosses. We keep punching, while she summons her Mushroom Guard. The guard can walk around and deals 50% HP on touch.
It's not over yet, though. Angelic Buster has a 120s burst cycle, but our cycle has a 60s
minor rotation as well. It's the one that uses Pretty Exaltation, meaning that if our music worked we'd be getting 30 seconds of Fly Away, 30 seconds of boss music, 20 seconds of Shining Heart, and then 40 seconds of boss music. How well we are playing is somewhat tied to how often our music is up, like with any good idol class.
We do have the problem of a golem spawning directly above us, of course, but…
…Nothing, there wasn't really counterplay available here because of how quickly golems slam down vs how slowly I move during Mascot's blast. Sometimes Lucid just kills you. This phase is kind of known for being a little bullshit for this reason, and it's
really a race to take it down before too many of our lives get shaved away.

Hmhmhm… you see? I can do anything in my dream! Just go to sleep already!

You gonna' let her get away with that, Angelic Buster?

Heck nah!
Upon reviving we normally have an incredibly short invincibility window, but the Resistance link skill (equipped offscreen) will extend it up to a maximum of 8 seconds. It doesn't matter here because there's a golem between us and Lucid that I have to clear out, but it's great for getting a little extra DPS in or reapplying buffs if necessary.
Still, while I'm over here I decide to take care of something. While fighting Lucid, butterflies have been appearing in the background. These ones are smaller than the giant blue ones that fire bullets, and they're something of a timer. Once the timer is filled, Lucid gets to use an ultimate—each butterfly splits in three and they start flying directly at us. We have to dodge them or each one will deal 20% HP on exploding, resulting in a very quick death.
Luckily, we can reset the timer.
By holding our NPC key over one of the statues, a gauge quickly fills up. Once it's full, the statue will blow its trumpet and incinerate all of the butterflies to reset the timer. This means we
need to be dealing damage to Lucid consistently throughout the fight, unless we want to deal with that ultimate attack.

Why must you be so
persistent! There's no way out of this dream!

Oh, I think I know a way!

Is that your plan you mentioned?

Sure is. You know how if you'd die in a dream, you wake up before it happens?

Uhh… not that I have much experience sleeping lately, but I'm familiar with the idea.

Since this is her dream, if I hit her enough she'll probably go through the same thing!

Ah… Sounds smart!
At 75% HP, we get our first notification that Lucid is angy. Each time we see one of these messages her attacks come a little closer together, and the butterflies in the background will spawn a little faster.

Huh… you really like those golems, don't you?

They can't move or attack, as long as we keep our side clear it's not a problem for us at all.

Keep that thinking up while you still can.
Here we get pressed into a bad position. A golem slams down over our escape and at the same time a mushroom is coming our way. We can't move too much, but we'd like to not take a death here.
I take out the first shroom after taking a single hit from it, and while Lucid summons a second one almost
immediately, a microadjustment to the left keeps it from hitting us while it goes wandering off to the right. We get out without eating a death, and now that I'm not
immediately about to die, our Burst Rotation is back up and ready to go again.
This time, Lucid doesn't do anything that's actually a problem until ~20 seconds into our Burst, meaning we get the entire thing for free. Being familiar with a boss's pattern lets you know when you can cheat out bonus damage, so be sure to study the basics!
…Nah, I'm kidding. Nobody should play this game.
After my Burst is over, the golems are mostly cleared out as well (Sparkle Burst hits a LOT of enemies and deals beaucoup damage). I take the opportunity to cleanse the butterflies out since the statues are full up and I'd rather not deal with that ult.
I'm also
carefully keeping an eye on the top-center notification area of the screen, because there's two patterns that I haven't seen yet. One of them comes randomly, and we're due for the other one to hit any minute now.
At 50% her patterns speed up again,
Lucid is about to unleash her power!
And we see one of her remaining two attacks, the bomb. Her bomb pattern spawns an explosive over the top of each party member's head, which counts down from 4. When it reaches 0, it explodes and we take 180% HP damage. This damage is divided by the number of party members in the same area at the time of explosion, so if a full party of 6 members stands on top of each other it only deals 30% damage.
Because there's just one of us, that's not an option. Thankfully, this oversight was fixed a couple of years after the boss was originally released (yes, this took
literal years).
The fix is these little dream bubbles, visible peeking out from behind the golem here. If a single player stands next to one, it counts as a second player. They spawn in fixed locations every time Lucid uses her bomb pattern, and it'll allow us to only take 90% damage instead of 180%. This might sound like a death sentence, but we're actually very resilient.
This is because we have a patently absurd number of potions, and in this boss the potion cooldown is 5 seconds between activation. Five seconds is
enough time to get killed if we're completely careless, but in practice we shouldn't die to anything short of an instant kill wombo combo like the golem earlier, or something else hitting us
right after the bomb goes off.
We don't have to
care, though, because Angelic Busters get Soul Resonance.
Update 11 wrote:
Soul Resonance:

Our first keydown skill, a skill which will remain active as long as we hold the button down. While held down, normal mobs around us will be drawn into the tornado, which will continually attack 10 enemies for 5 hits of 146% damage each. If the key is held down for at least 8 seconds (it can be continued for a total of 10), then the skill will end with a final blow that deals up to 600% damage 5 times based on the time held. The entire skill also has a bonus of 50% Boss Damage, but even with that these numbers are
anemic versus just Hitting Trinity More.
However, this skill is an important part of our kit because it's our first iframe! Short for 'Invulnerability frames,' this is shorthand for any skill that lets us dodge enemy attacks by Being Invincible. Soul Resonance's iframe lasts for the first 2 seconds of the skill, and for the remaining duration of it we reduce any damage we would take by 35%—this includes % max HP damage, which makes it incredibly strong as a defensive tool for bossing. It has a cooldown of 60 seconds, making it a very short cooldown for an iframe, so this skill is actually awesome. Just not for damage.
Lucid can only ever use this attack once every 90-120 seconds, and Resonance has a cooldown of 60s. As long as we don't use it anywhere else, we can
completely ignore this attack by holding the SR button down once the count is at 1.

Hey! Respect my attacks! You're in my dream, you know?!

Sorry, but that's an idol's privilege♥

I bet you think you're soooo smart!

Sure do!

…wuhoh.
Pictured: Me jumping backwards and using Trinity to attack and adjust position at the same time, at the
exact same moment that a golem begins to spawn right where I will be in about a second.
Like I said, you just kind of die sometimes in phase 1. It happens. We're making good time. No big deal.

Did someone catch the number of that truck..?

Oh, yeah, it was uh… 6011_3… um… M.

Thanks, Eskalade.
After respawning (I don't bother to cleanse yet), I start to push back towards the center before seeing this notification pop up. It's dragon time!

But I've been here the whole time?
Different dragon!

…Eskalade's also been here?
Bigger, and more green! I stop moving forwards (since Trinity will hit her from back here and I'm not going to start Bursting during this pattern) and keep an eye on the left side of the screen.
It pays off, as I win the coin toss.

Woah! That
is easy to see!

Ehhh… as long as it's on screen, anyways.
I was bigger.
The dragon will come down from either the left or right side of the screen, chosen at random.
Once it's at the bottom, it fires a spray of molten death across the entire screen. It lasts for several seconds and deals "you die"% HP damage. It can only be dodged by either standing directly on top of the dragon or hovering above the horrible death zone (most commonly done with the Blink 5thjob skill, which lets any class hover when used in midair).
While this timing is easy to pull off if you can see the dragon, trying to hover over the breath of a dragon on the other side of the stage from you requires a bit of timing. The breath lasts for a whole 4 seconds, so hovering too early can end with us falling right into the waiting fires of infinite burnination.
It takes some getting used to, but only a couple tries will put it right into muscle memory. This is why practicing bosses is so important!
I'm just kidding again, you shouldn't play this game.
But I'm also
not, because the best part of MapleStory is the bossing, as soon as you get past the period where they thought good design was "everything oneshots you or chainstuns you into oblivion so just never get hit, lol" the boss fights become legitimately engaging and even outright
enjoyable. It's the best part of the game, which is faint praise but it's also a good
enough part that I'd recommend it to anyone who enjoys megamany platform fighter games if the process required to
get to bossing didn't require several months of work.

Wait, so do you like this fight or not?!
Don't you have a dragon to worry about?

Nah, I'm in the safe spot, remember?
Lucid's only other noteworthy ability is being able to randomly teleport Magilia around the battlefield as she sees fit. She used to be able to use this
during the dragonfire to guarantee an instant kill, but thankfully this is
not implemented in v251.
Anyways, while I'm waiting for the dragon I cleanse because there's no reason not to.
About a minute later, she calls on another dragon and I miss the notification in the top-center so I just kind of eat fire to the face out of nowhere.

That's not fair! I didn't see anything at all!

Like I said, can't see it offscreen.
We're still fine. Later patches do give a green indicator that covers where the dragon's breath will hit ahead of time to serve as another warning, but this was
not implemented in v251.

Why… won't… you… DIE?!

Because idols are made of hopes and dreams! You didn't realize it, but you're actually fighting on MY turf!

That's absurd! I could give everyone in all of Maple World the same dreams at once… and now you think you can surpass my power? Then could you be… the one who stepped into that place?

…You did what?

Nevermind. If you don't know, it can't matter.

Any idea what she's talking about?

Not a clue. Maybe Kaiser did something?
At 25% Lucid enters her 'enraged' state, which means she'll be spamming attacks, golems, and background butterflies at the highest possible rate. Back in the day, most parties tried to stop damaging her at 30% and wait for Burst because of how annoying this phase could become.
I do not need to do this, because this is the
one fight in all of MapleStory I'm willing to call myself good at.
And while I do drop another life to being randomly teleported on top of a golem next to another golem (it happens, seriously, part 1 just Kills You sometimes), there's really only one way this can end. Lucid can't cheap out nearly unavoidable deaths fast enough to keep us from clearing part 1.
And while she summons her dragon
again, I'm keeping a careful eye out for it. Golems have blocked our path, so this is where hovering in midair with Blink becomes useful.

Now, Angelic Buster! Give her the whatfer!
I do one more Burst rotation, and I'd like to just point something out. Even on nearly full opacity, we're not able to see anything that's going on while we Burst. On full opacity, this is
still the case when we're mid rotation. The compromise to let us get away with this is those glowy outlines around enemies we're attacking. These will automatically show up over anything and everything else going on on screen, so when bossing it's most important to learn to read the boss's
body language, or else you won't be able to dodge things that happen in the middle of your biggest damage window.
Oh, also you have to know it exists and turn it on. It's buried somewhere in the options and isn't a default pick. Free tip for anyone who wants to make their own magical girl, I guess.
I pop the invincibility when Lucid goes for a bomb, and try to get standing on her. Golems don't spawn on top of her very often, and it's also outside of where the Guardian Mushrooms spawn giving plenty of time to react to her. This means the only thing we need to worry about is a bad sickles pattern.

Take this!!
…Like so.
This time, I just use Resonance to be invincible while the sickles pass over. MapleStory gives us tools that allow us to completely ignore patterns, and it also gives patterns that will just Kill You, and this is balance.
…No, seriously. That's one thing I actually like about this game. Everyone has their own brand of cheese that lets them circumvent the cheese the boss is throwing at you. No one fights fair.
This heads-up, however, means we're on a timer. It pops up whenever Lucid's superattack is getting close to fully charged, but only the first time it would get there. She's teleported us a short distance away, but we're within attacking distance so I wind up just going for it. There's a few too many golems to get to the statues right now, and going into phase 2 with 5 lives or 6 is roughly the same.
One more set of sickles, and we get lucky as they manage to pile on top of each other and all go
away from us.
Another set of golems + sickles gets another kill, and I take the opportunity to cleanse. Honestly, if I'd been paying attention I could have used my 60s to blitz through the rest of her HP and save myself a life, here I'm 30 seconds away from our big Burst rotation—for Angelic Busters after the remaster, staying on top of our cycle is important!
Anyways, with no further wrinkles I slowly push through the golems and knock off what remains of Lucid's HP.

Ah… no! No no no, I can't believe you've done this!

Believe it! I can't let you stop me here, Lucid!

And I can't let you stop
me! The party needs to go on… it MUST go on!
The flower disappears as Lucid takes flight.
No! The dream is collapsing!

Welcome back, Magilia.

Good to be here. Let's take the fight to her in THIS dream, too!

Don't you think it's over…

My city NEVER sleeps!
Lucid explodes the clock face behind her, and phase 2 begins.
In it, we (a magical girl) are now fighting Lucid (a butterfly-winged dream controlling witch) on top of the broken face of the clock she blew up while falling through the air as the clocktower collapses behind us.
…Hm.
Music: Bayonetta OST: One Of A Kind
Since I have my Burst I start it off right away, as Lucid does her sickles—she still has those in this phase, and it's important to keep her on screen to see when they're coming out. That warning still only happens once.
Binding Lucid is even more important in phase 2, because otherwise she'll fly around and sometimes become untargetable. This means phase 2 tends to last longer than phase 1, but as an upside there's nothing that can just randomly kill us anymore. Any death in phase 2 is my own fault.

So no more dying?
No promises, I haven't watched this part in months.
When Lucid comes unbound she summons her dragon by playing a green flute. The dragon this time has a breath that will sweep over the stage, and can only be dodged completely by standing on either the very bottom or very top of the stage, with the area up top giving more room to maneuver.
Additionally, a golem shows up to cause us a problem. In this phase, golems appear at regular intervals to break platforms. If we're there when the shockwave happens we take some damage. Additionally, they'll attack us if we're in range. They don't do enough damage to worry about.
She also still has butterflies, orange this time, that shoot orange bullets at us over time. They deal the same damage.
A few seconds later we get into the big thing of this phase: Lucid's Powerful Attacks. She has two, always alternates them, and is completely invincible during both patterns. Her wings turn red before both of them, but the important part is if she leaves with an upwards trail or simply vanishes. This time we see the upwards trail.
For both patterns we ideally want to start by standing up here. This platform can be broken by golems, though, so it's not always possible. In this one, Lucid's now in the background.
She fires off a bunch of lasers, each one giving us an indicator of where it'll show up about a second before it actually damages us. Each hit deals us 50% of our HP, meaning they can shave through our life quickly.
If we jump down from this platform and walk to the right, you'll naturally dodge almost all of the lasers and can grappling hook up once you reach the right side to avoid the attack well enough to avoid dying every time.
This is complicated by the dragonfire coming now and would normally force us to awkwardly move and jump around the top couple of platforms to stay safe… but we're still invincible so
After each Powerful Attack, Lucid returns to where she originally was. It'll be a couple of seconds before she does things again, so we're free to get a few Trinities off.
She still has bombs in this phase too, with a dream orb always showing up on the top-right platform. We still just Resonance through it.
We get the other Powerful Attack right in the middle of another dragonfire. That's perfectly fine, we don't need to get off this platform for the other one.
For this attack, Lucid spawns in the center and flies quickly around in a circle to deal 100% damage on touch. From our position we can dodge her by upjumping, and will have to do this twice in order to ensure she doesn't bonk us.
And that's… all there is to it. We have to cleanse occasionally to avoid the butterflies, but Phase 2 is all about just executing.
So execute we do.
…mostly. I miss another one of the dragon prompts and zero in on the Dream is Growing Stronger warning, dying to the dragon.
They've added a big green dragon warning box to this phase, too. I haven't lost a life to dragon in months. More importantly: remember that we got our warning about the dream here.
Revive. Cleanse.
Burst the boss.
Lasers again. It's worth noting that after recovering from a bind, Lucid has a 50-50 chance of using either one of her two Powerful Attack patterns on the next one, as the cooldowns for both will be ready. We can't just coast the entire fight.
Dodge the touch attack.
Resonance through another bomb.
This is the pattern for the next while. There's not much else to say, other than to explain why I'm not trying to dodge anything by jumping off of the map.
You can jump off the map at any time. If you do, you're moved back to a platform immediately. There's no penalty for doing this on Easy or Normal. On Hard, you lose half your current HP and are potion-locked for 10 seconds, usually resulting in a death due to all the danmaku flying around. I am used to playing on Hard, so I just never think to dodge by purposely falling down a hole.
Cleanse.
Burst.
Dodge.
This is all much more compelling to actually play, I promise.

Face it, Lucid: It's over for you!

It's not over… I can't let it end like this. If I do… he'll…!

You don't even know what's at stake here! You have no right to stop me!

The whole WORLD'S at stake here! I can't just back down!
Little by little, Burst by Burst, I whittle Lucid down…
But I make an error.
I don't get a heads-up that the Dream is Strengthening, and I forget to cleanse for a little too long while avoiding attacks between Bursts. I don't notice and emergency cleanse because the top
looks clear, but…

Finally… That blasted horn stayed quiet for long enough!

There's uh… a LOT of butterflies down here, huh?

Oh man, they were hiding just offscreen?!

Hold on to something!

You won't get the chance!
On activating her phase 2 ultimate, Lucid makes all the platforms disappear. We want to take that opportunity to quickly upjump and try and get as high as possible.
Lucid hovers in the center of the battlefield, and a butterfly waits on every corner of it. Each of them fires out a spinning pattern of bullets, which deal 100% HP damage on hit.
The top-center isn't exactly a
safe point, but it allows us to dodge by moving to the left and right for the most part.
After the attack is completed, the platforms reappear. We have a couple seconds before she shows up again, so I buff up for a Burst.
She doesn't survive the next burst. In Hard mode this would trigger a last stand where we have to deal ~13T damage in 40 seconds or less or lose the entire fight. On Normal and below this is not an issue.

No… oh, no..! I can't… any longer-! My dream…!
Upon her defeat, Lucid's wings disintegrate from the outside in…

You've doomed yourself, you know! That's all you've done!

What are you talking about?! I'm fighting to save everyone!

I don't owe you answers. Enjoy the nightmare you've trapped yourself in.
And she's gone.
Upon defeating Lucid, we find ourselves in front of the final music box. This is our treasure chest for the boss fight, and contains our swag for defeating the boss.
We won't cover the loot for the boss right now, since Magilia doesn't actually have it yet.

Aww, what a rip! I want some sweet loot, that was hard.

I'm sure that when the time comes, you'll have all the sweet loot you can carry.

…Right. For now, let's go back and see how Protective Mask is doing!
Video: vs Lucid