Waste Not is a rare Enchantment card from Wilds of Eldraine: Enchanting Tales (WOT), collector number 38. Current market price: $6.68 (foil $7.85), TCGplayer market prices via Scryfall.
Whenever an opponent discards a creature card, create a 2/2 black Zombie creature token. Whenever an opponent discards a land card, add {B}{B}. Whenever an opponent discards a noncreature, nonland card, draw a card.