Othelm, Sigardian Outcast {1}{G}{W}
Legendary Creature — Human
Identity
Selesnya
EDHREC rank
#16,809
Cheapest printing
US$0.42
TCGplayer
Printings
2
{2}, {T}: Choose target creature card in your graveyard that was put there from the battlefield this turn. Return it to the battlefield tapped.
Partner—Friends forever (You can have two commanders if both have this ability.)
Keywords: 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.