You may choose not to untap Giant Oyster during your untap step.
{T}: 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.
Near Mint - $0.95
Near Mint Non-English - $0.95
Lightly Played - $0.90
Lightly Played Non-English - $0.90
Moderately Played - $0.76
Moderately Played Non-English - $0.76
Heavily Played - $0.57
Heavily Played Non-English - $0.57
Damaged - $0.47
Damaged Non-English - $0.47
Foil Prices
Near Mint Foil - $1.25
Near Mint Foil Non-English - $1.25
Lightly Played Foil - $1.00
Lightly Played Foil Non-English - $1.00
Moderately Played Foil - $1.00
Moderately Played Foil Non-English - $1.00
Heavily Played Foil - $0.75
Heavily Played Foil Non-English - $0.75
Damaged Foil - $0.75
Damaged Foil Non-English - $0.75