Phenax, God of Deception {3}{U}{B}
Legendary Enchantment Creature — God
Identity
Dimir
EDHREC rank
#5,089
Cheapest printing
US$11.76
TCGplayer
Printings
3
Indestructible
As long as your devotion to blue and black is less than seven, Phenax isn't a creature.
Creatures you control have "{T}: Target player mills X cards, where X is this creature's toughness."
Keywords: indestructible, mill
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.