Karn, Gilded Guardian {2/W}{2/U}{2/B}{2/R}{2/G}
Legendary Artifact Creature — Golem
Identity
Five-color
EDHREC rank
#21,621
Cheapest printing
US$0.29
TCGplayer
Printings
3
Vigilance, trample
When Karn enters, draw a card for each color among other artifacts you 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.