The Duke, Rebel Sentry {W}
Legendary Creature — Human Rebel Ally
WhiteCommander: legal
Identity
White
EDHREC rank
#11,847
Cheapest printing
US$0.23
TCGplayer
Printings
1
The Duke enters with a +1/+1 counter on him.
{T}, Remove a counter from The Duke: Put a +1/+1 counter on another target creature you control. It gains hexproof until end of turn. (It can't be the target of spells or abilities your opponents control.)
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.