Void Primordial

Whenever you cast a black spell, deal X damage
to any target, where X is equal to half the mana
cost of the spell that was cast
{1}{b}{b}: Create a black 2/2 Void Primordial
creature token with "whenever you cast a black
spell deal to 2 damage to any target"
Resurrect {1}{b}{b} ({1}{b}{b} Return this card from
your graveyard to the battlefield, it gains haste)