Excava, the Risen Past {2}{R}{W}
Legendary Creature — Spirit Horse
Identity
Boros
EDHREC rank
#10,704
Cheapest printing
US$0.58
TCGplayer
Printings
1
Flying, haste
Whenever Excava attacks, return up to one target artifact, creature, or non-Aura enchantment card with mana value 3 or less from your graveyard to the battlefield with a finality counter on it. It's a 1/1 Spirit creature with flying in addition to its other types. (If a creature with a finality counter on it would die, exile it instead.)
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.