
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.
Circu, Dimir Lobotomist has 2 printings, first in Ravnica: City of Guilds (2005). EDHREC ranks it #17,834 among Commander cards. It appears most in The Madcap Jester decks (639 on EDHREC). It has 3 official rulings.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.