Seth, Uncertain Sorcerer

At the beginning of the game, declare upto three different colors. They become Seth's colors.

When you cast a spell that is one or more colors, choose one based one what colors the spell was. Chose each only once each turn.
White-create a 1/1 white spirit creature token with flying.
Blue-Tap target creature.
Black-Draw one and lose 1 life.
Red{dash}Deal 3 damage to target player or planeswalker.
Green{dash}target creature you control gets +3/+3 and trample until the end of the t