Rat King, Verminister {1}{B}
Legendary Creature — Rat Avatar
BlackCommander: legal
Identity
Black
EDHREC rank
#7,686
Cheapest printing
US$0.68
TCGplayer
Printings
2
Disappear — At the beginning of your end step, if a permanent left the battlefield under your control this turn, create a 1/1 black Rat creature token and put a +1/+1 counter on Rat King.
{T}, Sacrifice three Rats: Return target creature card and all other cards with the same name as that card from your graveyard to the battlefield tapped.
Keywords: disappear
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.