Marchesa, Dealer of Death {U}{B}{R}
Legendary Creature — Human Rogue
Identity
Grixis
EDHREC rank
#11,655
Cheapest printing
US$0.21
TCGplayer
Printings
4
Whenever you commit a crime, you may pay {1}. If you do, look at the top two cards of your library. Put one of them into your hand and the other into your graveyard. (Targeting opponents, anything they control, and/or cards in their graveyards is a crime.)
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.