Zix, Maddened by Power

Severance- When you cast this spell, if white
mana was spent, gain 1 life. If blue mana was
spent, create a 1/1 colorless thopter artifact
creature token with flying. If black mana was
spent, each opponent loses 1 life.
Artifact spells you control have severance, their
severance abilities are the same as this card's.
{w}{b}{u}: Return another target artifact you
control to your hand.