Mockery of Nature is a uncommon Creature — Eldrazi Beast card from Eldritch Moon (EMN), collector number 10. Current market price: $0.13 (foil $0.68), TCGplayer market prices via Scryfall.
Emerge {7}{G} (You may cast this spell by sacrificing a creature and paying the emerge cost reduced by that creature's mana value.) When you cast this spell, you may destroy target artifact or enchantment.