Seshiro the Anointed {4}{G}{G}
Legendary Creature — Snake Monk
GreenCommander: legal
Identity
Green
EDHREC rank
#8,509
Cheapest printing
US$5.03
TCGplayer
Printings
3
Other Snake creatures you control get +2/+2.
Whenever a Snake you control deals combat damage to a player, you may draw a card.
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.