Real name: Unrevealed
First and Last appearance: X-Force #116
Mutant Ability: Prehensile facial tentacles
One of the first casualties in the quest for fame, Sluk was a severely underpowered member of the team, who was only able to use his abilities up close. On top of that, he wasn't really the best mutant to have around during photo opportunities either (something noted by his former leader, Zeitgeist).
He died on a mission when he attempted to use his powers to subdue a man disarming land mines.