Kodama of the East Tree {4}{G}{G}
Legendary Creature — Spirit
GreenCommander: legal
Identity
Green
EDHREC rank
#999
Cheapest printing
US$3.97
TCGplayer
Printings
3
Reach
Whenever another permanent you control enters, if it wasn't put onto the battlefield with this ability, you may put a permanent card with equal or lesser mana value from your hand onto the battlefield.
Partner (You can have two commanders if both have 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.