Serum-Core Chimera (Phyrexia: All Will Be One)

Creature Ñ Phyrexian Chimera - Flying
Whenever you cast a noncreature spell, put an oil counter on this creature.
Remove three oil counters from this creature: Draw a card. Then you may discard a nonland card. When you discard a card this way, this creature deals 3 damage to target creature or planeswalker. Activate only as a sorcery.