Timeshifted Leviathan > < Ghost Ship
Giant Oyster
Creature — Oyster (CMC:4)
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.
22 TSB • ENNicola Leonard
™ & © 1993—2006 Wizards of the Coast
Legal in: Modern,Time Spiral Block,Legacy,Vintage,Freeform,Prismatic,Tribal Wars Legacy,Singleton 100,Commander
Oracle Text (click to copy):
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10/4/2004 If the Oyster untaps during the draw step before its ability to add a -1/-1 counter resolves, the -1/-1 counter effect resolves and adds a -1/-1 counter after the -1/-1 counters are removed due to being untapped. 9/25/2006 The activated ability can target only a tapped creature. 9/25/2006 Activating the ability creates a continuous effect that works only as long as Giant Oyster remains tapped, a repeating delayed triggered ability that's in effect only as long as Giant Oyster remains tapped, and a delayed triggered ability that triggers when Giant Oyster untaps or when it leaves the battlefield. 9/25/2006 Giant Oyster's ability can be activated during your upkeep, and the creature will get a -1/-1 counter during the draw step that follows it.
Card Giant Oyster is not on TCGPlayer.