Obelisk of Undoing (58) [Antiquities]Set: Antiquities Type: Artifact Rarity: rare Cost: {1} {6}, {T}: Return target permanent you both own and control to your hand.

deals 8 damage to each opponent

" Whenever an Illusion you control dies

Set: Friday Night Magic 2005 Type: Instant Rarity: rare Cost: {U}{U} Counter target spell

Set: Secret Lair Drop Type: Creature — Human Druid Rarity: rare Cost: {1}{W}{W} Whenever you cast an enchantment spell

and has myriad

Set: Commander Masters Type: Instant Rarity: rare Cost: {2}{G} If you control a commander

Set: Forgotten Realms Commander Type: Land Rarity: rare {T}: Add {C}

then destroy the rest

Set: Ixalan Promos Type: Creature — Merfolk Shaman Rarity: rare Cost: {1}{G} Whenever you cast a noncreature spell

Set: Oath of the Gatewatch Promos Type: Land Rarity: mythic This land enters tapped

You lose the game when that creature leaves the battlefield

Set: Fifth Dawn Type: Instant Rarity: rare Cost: {5}{W} Double target player's life total