Waste Not is a rare Enchantment card from Commander 2016 (C16), collector number 117. Current market price: $8.60, 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.