Alharu, Solemn Ritualist {4}{W}
Legendary Creature — Human Monk
WhiteCommander: legal
Identity
White
EDHREC rank
#15,085
Cheapest printing
US$0.12
TCGplayer
Printings
5
When Alharu enters, put a +1/+1 counter on each of up to two other target creatures.
Whenever a nontoken creature you control with a +1/+1 counter on it dies, create a 1/1 white Spirit creature token with flying.
Partner (You can have two commanders if both have partner.)
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.