Circu, Dimir Lobotomist {2}{U}{B}
Legendary Creature — Human Wizard
Identity
Dimir
EDHREC rank
#17,912
Cheapest printing
US$0.41
TCGplayer
Printings
2
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.
Every printing
highest TCGplayer market first; a card with only a thin single listing shows its low
In short
A Commander deck is a commander and 99 other cards, one copy of each (except basic lands), all inside the commander's colour identity. Paste a full list into the deck price calculator to price it and check it against the format.