Choco, Seeker of Paradise {1}{G}{W}{U}
Legendary Creature — Bird
Identity
Bant
EDHREC rank
#6,162
Cheapest printing
US$0.37
TCGplayer
Printings
4
Whenever one or more Birds you control attack, look at that many cards from the top of your library. You may put one of them into your hand. Then put any number of land cards from among them onto the battlefield tapped and the rest into your graveyard.
Landfall — Whenever a land you control enters, Choco gets +1/+0 until end of turn.
Keywords: landfall
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.