Death to Our Enemies is a uncommon Enchantment — Plan card from Marvel Super Heroes (MSH), collector number 127. Current market price: $0.23 (foil $0.35), TCGplayer market prices via Scryfall.
Whenever you cast a noncreature spell, create a tapped Treasure token and put a plan counter on this enchantment. When the fourth plan counter is put on this enchantment, sacrifice it. When you do, it deals 7 damage divided as you choose among one or two targets.