Waste Not is a rare Enchantment card from Secret Lair Drop (SLD), collector number 1299. Current market price: $29.81 (foil $39.77), 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.