ディミーアの脳外科医、シアクー (Circu, Dimir Lobotomist) (ja)
Legendary Creature - Human Wizard | Power/Toughness: 2 / 3 (CMC 4)
Whenever you cast a blue spell, exile the top card of target player's library.
Whenever you cast a black spell, exile the top card of target player's library.
Your opponents can't cast spells with the same name as a card exiled with Circu, Dimir Lobotomist.