Krav, the Unredeemed {4}{B}
Legendary Creature — Demon
BlackCommander: legal
Identity
Black
EDHREC rank
#10,273
Cheapest printing
US$2.62
TCGplayer
Printings
2
Partner with Regna, the Redeemer (When this creature enters, target player may put Regna into their hand from their library, then shuffle.)
{B}, Sacrifice X creatures: Target player draws X cards and gains X life. Put X +1/+1 counters on Krav.
Keywords: partner with, partner
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.