Waste Not is a rare Enchantment card from Magic 2015 (M15), collector number 122. Current market price: $6.19 (foil $18.75), 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.