Neheb, Dreadhorde Champion is a rare Legendary Creature — Zombie Minotaur Warrior card from Dominaria United Commander (DMC), collector number 125. Current market price: $0.51, TCGplayer market prices via Scryfall.
Trample Whenever Neheb deals combat damage to a player or planeswalker, you may discard any number of cards. If you do, draw that many cards and add that much {R}. Until end of turn, you don't lose this mana as steps and phases end.