Zu-Ze and the Spectral

Face down creatures you control have evolve (Whenever a creature enters the battlefield under your control, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.)
{w/b}{w/b}: Turn target creature you control face down (It is a 2/2 creature with no abilities.)
{g/u}{g/u}: Turn target face down creature with one or more +1/+1 counters on it face up.