Obelisk of Undoing [Antiquities] Dragons of Tarkir Prerelease Promos destroy all non-Wall creatures that

destroy all non-Wall creatures that player controls that didn't attack this turn

Destroy all creatures in the pile of that player's choice

Set: Portal Type: Creature — Insect Rarity: Rare Cost: {1}{B}{B} When Endless Cockroaches dies

Set: Commander 2015 Type: Sorcery Rarity: Rare Cost: {4}{U}{U}{U} For each opponent

the Infinite Gyre is put into a graveyard from anywhere

Obelisk of Undoing [Antiquities] Dragons of Tarkir Prerelease Promos destroy all non-Wall creatures thatSet: Antiquities Type: Artifact Rarity: Rare Cost: {1} {6}, {T}: Return target permanent you both own and control to your hand. The Battle of Tomakul taught Urza not to rely on fickle reinforcements.