Nightreign's new hard mode bosses are a true endgame challenge, but if you can beat them, the Sovereign Sigils are a powerful reward.

Those are the best current options for spending your Sovereign Sigils in Elden Ring: Nightreign, whether you just beat your first Everdark Sovereign or you’re a grizzled veteran. At a certain point, you’ll have enough to buy everything; that’s true for the rest of the vendors as well.