Create "Explosion of tacks and other pointy metal objects capable of piercing the virus capsule"
[6] It works. A lot of people die. Say, are any of them important? No? Good.
Transfer intelligience into Nanobot swarm.
[5] Oh my. GLaDos is now in nanobot form! On Mars, even!
Harness self through minions. Become izanami, the shinto god of the sky. Do god things.
[4] You harness your minions, [4] and become Izanami. [6] You flood the whole Mars and turn people to salt when they look back, and while you're at it put things into motion dooming everyone to damnation while blaming it on them. Judeo-Christians mistake you for their god. You are being bombarded with prayers, like "Seal the dome!" And "Oh god the anexphixiation and the drowning and the HELP I'm dying..."
Utilize cosmic cello to turn the Xenomorph into pianist of my ORCHESTRA Of DOOM.
[5] You turn Batxenomorph into your pianist! It [4] grabs a Batpiano.
Respawn as the master of all air magic.
[2] You do not respawn.
use my flame thrower air blast to put out the fire on me then KILL THE BATOMORPH WITH FIRE IT IS A MONSTER
You are put out by the flood. [5] Despite the flood, you burn at the Batxenomorph it uses [1] some Batgasoline on itself. Wow, you just killed the Dark Xenoknight. Oh, wait, water. It's alive.
Utilize cosmic cello to turn the Xenomorph into pianist of my ORCHESTRA Of DOOM.
*ahem*Duh duh DUUUUUUUUUUUUUUUHHHH.
[2] This is in the same universe as YOU AT FINAL BOSS, so ice cream.
GN Turn:
The dome floods. The xenomorphs are OK. [2,2,5,4] The cybermorphs manage to get shots off at people, specifically killerhellhound, [1,5-1] and he dodges into one and away from the other. It hurts--between the being on fire and the being shot, he can't take much more.
[6,4] Both cybermorphs are waterproof, the second after modifying itself heavily.