Aang, Air Nomad {3}{W}{W}
Legendary Creature — Human Avatar Ally
WhiteCommander: legal
Identity
White
EDHREC rank
#11,817
Cheapest printing
US$0.21
TCGplayer
Printings
3
Flying (This creature can't be blocked except by creatures with flying or reach.)
Vigilance (Attacking doesn't cause this creature to tap.)
Other creatures you control have vigilance.
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.