Relic Amulet is a uncommon Artifact card from Zendikar Rising (ZNR), collector number 247. Current market price: $0.15 (foil $0.20), TCGplayer market prices via Scryfall.
Whenever you cast an instant, sorcery, or Wizard spell, put a charge counter on this artifact. {2}, {T}, Remove all charge counters from this artifact: It deals that much damage to target creature.