Mathas, Fiend Seeker {R}{W}{B}
Legendary Creature — Vampire
Identity
Mardu
EDHREC rank
#10,404
Cheapest printing
US$0.52
TCGplayer
Printings
3
Menace
At the beginning of your end step, put a bounty counter on target creature an opponent controls. For as long as that creature has a bounty counter on it, it has "When this creature dies, each opponent draws a card and gains 2 life."
Keywords: menace
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.