Will, Scion of Peace {1}{W}{U}
Legendary Creature — Human Wizard
Identity
Azorius
EDHREC rank
#5,929
Cheapest printing
US$0.94
TCGplayer
Printings
4
Vigilance
{T}: Spells you cast this turn that are white and/or blue cost {X} less to cast, where X is the amount of life you gained this turn. Activate only as a sorcery.
Keywords: 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.