Whiskers

Indestructible, Infect
Whiskers can't be countered.
Whenever a creature dies, gain a soul counter.
Whiskers gains +1/+1 for each soul counter.
If Whiskers causes a player to lose the game,
remove all soul counters.
Remove 20 soul counters: Until end of turn, if Whiskers leaves
the battlefield, target player loses the game.
Floofiness at any cost