Jarvis, Earth's Mightiest Butler {2}{U}
Legendary Creature — Human Advisor
BlueCommander: legal
Identity
Blue
EDHREC rank
#12,940
Cheapest printing
US$0.26
TCGplayer
Printings
3
Whenever you cast a Hero spell, draw a card.
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.