Thief of Sanity - Guilds of Ravnica #205

Thief of Sanity

Set: Guilds of Ravnica (GRN)
Collector Number: 205
Type: Creature — Specter
Rarity: Rare
Mana Value: 3.0

Flying
Whenever this creature deals combat damage to a player, look at the top three cards of that player's library, exile one of them face down, then put the rest into their graveyard. You may cast that card for as long as it remains exiled, and mana of any type can be spent to cast that spell.