Zombify

If you control a zombie, target creature with
power X or less loses all its abilities and types
and becomes a 2/2 Zombie creature with "This creature is controlled by no player and attacks a
random player each turn if able to", where X =
half the number of zombies in play.
Buyback {b}{b}{b}.
They became a raving mob of the insane infected, attacking anyone they could overpower or outrun.