Tariel, Reckoner of Souls {4}{R}{W}{B}
Legendary Creature — Angel
Identity
Mardu
EDHREC rank
#10,395
Cheapest printing
US$1.26
TCGplayer
Printings
5
Flying, vigilance
{T}: Choose a creature card at random from target opponent's graveyard. Put that card onto the battlefield under your control.
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.