Witch Engine [Urza's Saga] Gargoyle Set: Journey into Nyx Type:

Set: Journey into Nyx Type: Enchantment Rarity: Common Cost: {G} {1}{G}

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

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

0: Until end of turn

you knock on wood

Witch Engine [Urza's Saga] Gargoyle Set: Journey into Nyx Type:Set: 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.)