Crosis, the Purger {3}{U}{B}{R}
Legendary Creature — Dragon
Identity
Grixis
EDHREC rank
#14,028
Cheapest printing
US$0.63
TCGplayer
Printings
4
Flying
Whenever Crosis deals combat damage to a player, you may pay {2}{B}. If you do, choose a color, then that player reveals their hand and discards all cards of that color.
Keywords: flying
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.