Merrow Levitator

Whenever you cast a white spell, this creature gets +1/+1 until end of turn.

Whenever you cast a blue spell, this creature gains flying until end of turn.

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

Whenever you cast a noncreature spell, target creature gains flying until end of turn.

Whenever you cast an instant, sorcery, or Wizard spell, this creature gains flying until end of turn.

Whenever you cast a blue spell, this creature gets +1/+1 until end of turn.

Whenever you cast a black spell, this creature gains fear until end of turn. (It can't be blocked except by artifact creatures and/or black creatures.)

Flying

Whenever you cycle or discard a card, target creature gains flying until end of turn.

Flying

Whenever you cast an instant or sorcery spell, this creature gets +1/+1 until end of turn.