The Master, Transcendent {1}{B}{G}{U}
Legendary Artifact Creature — Mutant
Identity
Sultai
EDHREC rank
#5,323
Cheapest printing
US$0.77
TCGplayer
Printings
4
When The Master enters, target player gets two rad counters.
{T}: Put target creature card in a graveyard that was milled this turn onto the battlefield under your control. It's a green Mutant with base power and toughness 3/3. (It loses its other colors and creature types.)
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.