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Bolas's Citadel
Magic: The Gathering
Set
Mystery Booster 2
Rarity
rare
Type
Legendary Artifact
Collector number
39
Card text
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.