Alchemist's Gambit [Innistrad: Double Feature] Cyborg Knight you may destroy target artifact

you may destroy target artifact or enchantment

At the beginning of each end step or when Tombstone Stairwell leaves the battlefield

If damage is prevented this way

Set: Alpha Edition Type: Creature — Bird Rarity: Rare Cost: {G} Flying

Alchemist's Gambit [Innistrad: Double Feature] Cyborg Knight you may destroy target artifactSet: Innistrad: Double Feature Type: Sorcery Rarity: Rare Cost: {1}{R}{R} Cleave {4}{U}{U}{R} (You may cast this spell for its cleave cost. If you do, remove the words in square brackets.) Take an extra turn after this one. During that turn, damage can't be prevented. [At the beginning of that turn's end step, you lose the game.] Exile Alchemist's Gambit.