Kolossus is a bearded, winged humanoid wearing dull tan armor with purple spots around it & a red cape and is equipped with a serrated purple sword. His most noticeable feature is his mount, which appears to be a large draconic horse-like creature equipped with bluish slate-colored armor that covers its dark & dull red body.
- Attack: Apocalyptical
- Life: Juggernaut
- Speed: Very Slow
- ↑ Kolossus' mount walks to the enemy, then he disappears into them while performing multiple slices of his sword. The same animation was first seen on Garlog followed by Wrath.
- ↑ Kolossus' mount walks to the enemy, then he shoots a blue laser from his sword very quickly.
Kolossus is one of the most powerful of all mutants. In a world of peace, his appetite for war is now sated in the arena.
- Upon release, this mutant was glitched having the name $specimen-ce-11, had no Biography, valid attack names, or SFX. However, everything except the SFX has been fixed after unspecified date.
- This mutant's name is similar to Colossus.
- It looks like more similar to HearthStone minion card, The Black Knight.
- This mutant is the first mutant with 3.51 speed ever released.
- Bears a resemblance to Skull Knight from Berserk. Kolossus' Astral Sword may reference the Blast of the Astral World.
- It somehow looks like a mix between Odin from Final Fantasy XIV and Ultima Weapon from the same franchise.