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Mission 11 of 15

Marvel Cosmic Invasion: Mission 11: Sanctuary II (The Great Experiment) walkthrough

Thanos's ship, with ceiling lasers along the way and Thanos on his throne at the end.

  • About 9–11 min in the videos
  • 2 parts · 6 steps
  • 1 boss

Compiled from 3 playthrough videos and 8 guides · checked Oct 19, 2026

0 of 2 done
Video: packattack04082 on YouTube. Loads from youtube-nocookie.com only when you press play.

What each player can do here

P1 · Player 1
  • Phyla-Vell: her parry is part of her charged heavy attack.
P2 · Players 2–4
  • Iron Man: his special is an arm cannon blast.

If your skill levels differ: A hero still earns experience when you lose, so a failed attempt is not wasted; the newer player can keep going without losing progress. How to split the roles

The ship

Part 1 of 2. Cross Sanctuary II.

  1. BothChallenge: avoid the ship's defence lasers; watch for the marks they put on the floor.
  2. Player 1Challenge: ten parries with Phyla-Vell, which come from her heavy attack.
  3. Players 2–4Challenge: ten kills with Iron Man's special.

Boss: Thanos

Part 2 of 2. Beat Thanos.

  1. BothBlock or parry his flaming uppercut; it stuns him for a few seconds.
  2. BothWhile he sits on his throne, hit the drone that fires back at him: the shot knocks him off the throne.
  3. BothStay out of the line of his laser cannon.

Boss

ThanosThe Mad Titan

  1. Uppercut: A flaming uppercut that hits hard.
  2. Throne and drones: Drones attack while he stays on his throne until one is hit back at him.
  3. Blades: Spinning blades and spawned adds; two blades in the later phase.
  • TheGameSlayer: standing behind him while the cannon fires lets you hit him safely.
Sources (11)

Steps compiled from 3 playthrough videos and 8 text guides, checked Oct 19, 2026, and written in our own words. We did not play the game for this guide. A step marked “single source” rests on one guide so far.