Sleeper Agent [Urza's Saga] Oyster negate the effects of that

negate the effects of that opponent’s monster during the Battle Phase

Set: Champions of Kamigawa Type: Basic Land — Forest Rarity: Common ({T}: Add {G}

Sacrifice Vessel of Paramnesia: Target player mills three cards

Set: 2020 Tin of Lost Memories Card type: Effect Monster Rarity: Prismatic Secret Rare Attack: 2400 Defense: 1000 Your opponent cannot target other Spellcaster monsters you control with card effects

Set: Asia Pacific Land Program Type: Basic Land — Island Rarity: Common ({T}: Add {U}

Sleeper Agent [Urza's Saga] Oyster negate the effects of thatSet: Urza's Saga Type: Creature Phyrexian Minion Rarity: Rare Cost: {B} When Sleeper Agent enters the battlefield, target opponent gains control of it. At the beginning of your upkeep, Sleeper Agent deals 2 damage to you.