Serum Sovereign 
Creature — Phyrexian Sphinx
Flying
Whenever you cast a noncreature spell, put an oil counter on this creature.
, Remove an oil counter from this creature: Draw a card, then scry 2.
Legality
standardNOT LEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL