Thranduil the Strategist {3}{G}{U}
Legendary Creature — Elf Noble
Identity
Simic
EDHREC rank
#14,553
Cheapest printing
US$30.37
TCGplayer
Printings
1
Other Elves you control have "{T}: Add {G} or {U}."
Landfall — Whenever a land you control enters, create a 1/1 green Elf creature token.
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.