Armix, Filigree Thrasher {2}{B}
Legendary Artifact Creature — Golem
BlackCommander: legal
Identity
Black
EDHREC rank
#6,214
Cheapest printing
US$0.33
TCGplayer
Printings
3
Whenever Armix attacks, you may discard a card. When you do, target creature defending player controls gets -X/-X until end of turn, where X is the number of artifacts you control plus the number of artifact cards in your graveyard.
Partner (You can have two commanders if both have partner.)
Keywords: partner
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.