Medulla



""

Medulla is the boss of Zone 5 and the final boss of the Campaign. In addition to Medulla herself, you must also fight the White variants of Embryo, Vespula and Justice, as well as an additional challenge called the Aethersphere.

Backstory




-In-game Codex entry for Medulla

Overview
Medulla consists of 7 "regular" boss phases, where you either fight Medulla herself or the final phase of Embryo, Vespula or Justice. If you deal enough damage to the boss during each of these phases, you will progress to the next phase and a Powerup and a Battery will be dropped.

There is also an extra "8th phase", the Aethersphere, where you must defeat a series of waves of unique Geo enemies.

Phase 1: Dome + static bullet spray


"GO AWAY!"

During this phase, Medulla takes the form of a dome in the middle of the arena, and alternates between two attack patterns


 * 1) Spraying a bullet pattern out in all directions, in addition to four lasers slowly turning clockwise. After some time, the bullets will retract back towards the dome and then disappear.
 * 2) The same bullet behavior, except this time with two lasers that turn counter-clockwise quickly, and also alternate between on and off.

Damaging Medulla causes her to emit weapon power pickups.

The general strategy is to Weapon Swap through the bullets, hug close to the dome while making good use of your secondary, and rotating around in the same direction as the lasers in order to collect weapon power. When the bullets retract, simply weapon swap back through them to escape. Repeat until the phase is over.

Phase 2: White Embryo


"Let's finish this!"

This phase consists of essentially the final phase of the Embryo boss fight, except that he is white in color, has more health, and has Medulla's voice.

A powerup spawns in the middle of the arena with Embryo, try to collect it at the beginning of the phase since it gets destroyed as phase 3 starts due to its position.

A good strategy is to hug his right shoulder to avoid the spiral bullet pattern, just like the normal Embryo fight.

Try to finish off Embryo while he is away from the centre of the arena, otherwise the weapon energy he drops will get covered up by the shell and be lost.

Phase 3: Dome + moving bullet spray


"I will not falter!"

Similar to Phase 1, except this time the bullets orbit around the dome after being emitted, and there are no lasers.

The same strategy as Phase 1 applies here, it should be a straightforward phase. Hug close, use your secondary, and circle to grab weapon power. Weapon Swap through the bullets when appropriate.

If you made it this far without knockdowns, you should reach full weapon power in this phase.

Phase 4: White Vespula


"You fiend! I shall permit you no further!"

This phase consists of essentially the final phase of the Vespula boss fight, except that she is white in color and has Medulla's voice. A powerup spawns in the middle of this phase just like Embryo.

A good strategy is to stay fairly close to avoid the Wasp swarm, avoid the attack patterns, and DPS her down, just like the normal Vespula fight.

Phase 5: Dome + spontaneous purple bullets


"Do not interfere! I have sacrificed too much!"

Another dome phase, except this time a series of purple bullets will spawn spontaneously and fire in your direction. Their spawning is telegraphed by shrinking purple rings. These bullets are an instant knockdown on hit unless you have Accelerate, in which case you can survive one hit from full health.

There are also tight rings of blue bullets that can spawn, which are telegraphed by slower, thicker shrinking blue rings. Each of these bullets only deals 1 damage, so they're less of a threat.

Avoid these by walking around them or Weapon Swaping through them, while DPSing down the dome as much as possible. Staying in the bottom area is probably the most favorable camera angle for anticipating the attacks.

Phase 6: White Justice


"Unexpected resistance encountered, activating additional units..."

This phase consists of essentially the final phase of the Justice boss fight, except that he is white in color and has Medulla's voice. The only tangible difference is that you need to destroy two fenceposts to spawn a powerup, rather than just one. Justice himself spawns on top of a powerup at the centre of the room.

A good strategy is to circle him, occasionally kill the laser fenceposts to give yourself space and spawn Powerups, and DPS him down, just like the normal Justice fight.

Note that he can be Surged with his own head, just like the normal Justice fight.

Phase 7: Faux-final form, tentacles and laser turret


"Only I can alter this destiny!"

In this phase, Medulla takes up the centre of the arena, but poses no threat by herself. Instead, you are threatened by all of these four things at once:


 * A laser cannon which occasionally appears from the ceiling and slowly tracks you for high damage. You can walk under it to avoid it, or even put Medulla between yourself and it to have it damage Medulla for you.
 * Tentacle-like towers which spawn from the ground and will attempt to slap downwards at you. The slap attack can be dodged by circling tightly around, or Weapon Swapping. The tentacles have relatively low health and can spawn Powerups.
 * Smaller "nodes" that spawn from the ground and have no attacks, but if you get too close to them they will do contact damage similar to Justice. They also have low health and can spawn Powerups.
 * The blue bullet rings from Phase 5.

Your general strategy here is to focus on damaging Medulla herself, getting rid of any inconvenient tentacles or nodes, and picking up Powerups. When the laser turret appears you can simply circle and hide behind Medulla.

And just when you think it's all over:

Phase 8: The Aethersphere


'"I was so close, too...."'

'"CONNECTING TO THE AETHERSPHERE"'

In this phase your Battery will be charged to full, and you must overcome waves of various Geo enemies before it runs out. The wave is designed to push your battery to its limits, so this one phase takes much longer than any other phase in the battle.

There are also some special rules in this section:
 * No batteries will drop for the entire duration, you get exactly 60 seconds to beat this phase
 * No powerups will spawn at all, any powerups carried over from the previous phase will end immediately.
 * No weapon energy spawns, instead your weapon will rapidly gain energy at all times, filling up to level 3 in about 3 seconds if it wasn't already maxed. This happens at all times, so if you get knocked down, you will rapidly regain max weapon level.

Focus on taking out the most important

Recommended androids
Both Cactus and Coral sport excellent overall DPS. Coral in particular is good for surging Justice with his own head.

Starch is also quite a good choice, as her laser deals solid DPS and the micro missiles are amazing in the Aethersphere.

Cactus
Medulla:

Cactus:

Medulla:

 

Cactus:

Medulla:

Cactus:

Holly
Medulla:

Holly:

Medulla:

 

Holly:

Medulla:

Holly:

Lemon
Medulla:

Lemon:

Medulla:

 

Lemon:

Medulla:

Lemon:

Coral
Medulla:

Coral:

Medulla:

 

Coral:

Medulla:

Coral:

Starch
Medulla:

Starch:

Medulla:

 

Starch:

Starch:

Aubergine
Medulla:

Aubergine:

Medulla:

 

Aubergine:

Medulla:

Aubergine:

Shiitake
Medulla:

Shiitake:

Medulla:

 

Shiitake:

Medulla:

Shiitake:

Peanut
Medulla:

Peanut:

Medulla:

 

Peanut:

Medulla:

Peanut:

Liquorice
Medulla:

Liquorice:

Medulla:

 

Liquorice:

Medulla:

Liquorice:

Voice lines
When Medulla is using the spare bodies of previous bosses, she speaks the same lines as they do for melee attacks and knockdowns. The following quotes only apply to the shell phases and the final phases

Melee attack (Phase 7 only)
"Annoying."

"Got you!"

"Don't distract me!"

Player knockdown during phases 1, 3, 5 and 7
"YESSS!"

"Good."

"And stay there!"

Player knockdown during phase 8
'"Embrace eternity!"'

'"All shall be won!"'

'"This is the future"'

Final phase defeated
"You've saved... every.. thiiiiinng"

Trivia

 * Medulla's battle theme features remixed versions of the themes for Embryo, Vespula and Justice which are played during their respective phases.