name: Giant Oyster
originalText: You may choose not to untap Giant Oyster during your untap phase.
  ocT: Target tapped creature does not untap during its controller's untap phase as long as Giant Oyster remains tapped. During your upkeep, put a -1/-1 counter on that creature. If Giant Oyster becomes untapped or leaves play, remove all these counters from the creature.
printings: HML, TSB
text: You may choose not to untap this creature during your untap step.
  {T}: For as long as this creature 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 this creature leaves the battlefield or becomes untapped, remove all -1/-1 counters from the creature.
type: Creature — Oyster