Commander Mustard {3}{R}{W}
Legendary Creature — Human Soldier
Identity
Boros
EDHREC rank
#11,806
Cheapest printing
US$1.04
TCGplayer
Printings
1
Vigilance
Other Soldiers you control have vigilance, trample, and haste.
{2}{R}{W}: Until end of turn, Soldiers you control gain "Whenever this creature attacks, it deals 1 damage to defending player."
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.