Kefnet, Wisdom Incarnate

Flying
Whenever an opponent casts a—
•White spell, you gain 3 life.
•Blue spell, create a 2/2 blue Illusion creature
token with ''Whenever this creature becomes the target of a spell, sacrifice it.''
•Red spell, discard a card, then draw two cards.
{bull}Green spell, return target card from your
graveyard to your hand.