Bolas's Citadel (White Border)

Set: Mystery Booster 2 (#39)

Rarity: Rare

Type: Legendary Artifact

Mana Cost: {3}{B}{B}{B}

Colors: Black

You may look at the top card of your library any time. You may play lands and cast spells from the top of your library. If you cast a spell this way, pay life equal to its mana value rather than pay its mana cost. {T}, Sacrifice ten nonland permanents: Each opponent loses 10 life.