Witch Engine [Urza's Saga] Gargoyle then you may return a

then you may return a land you control to its owner's hand

they reveal cards from the top of that library until a card named Mirror-Mad Phantasm is revealed

Set: Commander 2014 Type: Instant Rarity: Common Cost: {3}{B} Tendrils of Corruption deals X damage to target creature and you gain X life

Set: Dominaria Prerelease Promos Type: Legendary Creature — Bird Cleric Rarity: Rare Cost: {3}{W} Flying

that player loses 2 life and you gain 2 life

Witch Engine [Urza's Saga] Gargoyle then you may return aSet: Urza's Saga Type: Creature Horror Rarity: Rare Cost: {5}{B} Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.) {T}: Add {B}{B}{B}{B}. Target opponent gains control of Witch Engine. (Activate this ability only any time you could cast an instant.)