Niv-Mizzet and Prismari

Flying
This spell cannot be countered.
Spells you control can't be countered.
Whenever you cast or copy an instant or sorcery
spell create a Treasure token, and draw a card.
Sacrifice any number of artifacts you control, {t}: Niv-Mizzet and Prismari deals X damage to
any target where X is the number of artifacts sacrificed this way.