Balthor the Defiled is a rare Legendary Creature — Zombie Dwarf card from Secret Lair Drop (SLD), collector number 462. Current market price: $15.85 (foil $15.45), TCGplayer market prices via Scryfall.
Minion creatures get +1/+1. {B}{B}{B}, Exile Balthor: Each player returns all black and all red creature cards from their graveyard to the battlefield.