Giant Oyster
Creature - Oyster
You may choose not to untap Giant Oyster during your untap step.
: For as long as Giant Oyster remains tapped, target tapped creature doesn't untap during its controller's untap step, and at the beginning of each of your draw steps, put a -1/-1 counter on that creature. When Giant Oyster leaves the battlefield or becomes untapped, remove all -1/-1 counters from the creature.
legal Legacy
legal Vintage
legal Modern
not legal Standard
not legal Pioneer
not legal Pauper
not legal Historic
legal Commander