Neheb, Dreadhorde Champion [War of the Spark]

Set: War of the Spark Type: Legendary Creature — Zombie Minotaur Warrior Rarity: Rare Cost: {2}{R}{R} TrampleWhenever Neheb, Dreadhorde Champion 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.