Ulamog, the Infinite Gyre (Topper) [Ultimate Masters Box Topper] SM193 tap Demonic Hordes and sacrifice

tap Demonic Hordes and sacrifice a land of an opponent's choice

Set: Jumpstart 2022 Type: Creature — Elf Warrior Rarity: Rare Cost: {4}{G}{G} At the beginning of each upkeep

Supporting this hteory

When that mana is spent to cast an instant or sorcery spell

Set: World Championships 2008 Type: Darkness Rarity: Rare Retreat cost: Colorless

Ulamog, the Infinite Gyre (Topper) [Ultimate Masters Box Topper] SM193 tap Demonic Hordes and sacrificeSet: Ultimate Masters Box Topper Type: Legendary Creature Eldrazi Rarity: Mythic Cost: {11} When you cast this spell, destroy target permanent. Indestructible Annihilator 4 (Whenever this creature attacks, defending player sacrifices four permanents.) When Ulamog, the Infinite Gyre is put into a graveyard from anywhere, its owner shuffles their graveyard into their library.