Chalice of the Void [Mirrodin] Hour of Devastation Prerelease Promos you can't lose the game

you can't lose the game and your opponents can't win the game

−6: You get an emblem with "Whenever you cast a spell that targets one or more permanents

flip a coin

Whenever a player casts a spell with converted mana cost equal to the number of charge counters on Chalice of the Void

"Take a moment

Chalice of the Void [Mirrodin] Hour of Devastation Prerelease Promos you can't lose the gameSet: Mirrodin Type: Artifact Rarity: Rare Cost: {X}{X} Chalice of the Void enters the battlefield with X charge counters on it. Whenever a player casts a spell with converted mana cost equal to the number of charge counters on Chalice of the Void, counter that spell.