Stormfire Amulet

Wondrous item, legendary (requires attunement)

This item consists of a flame-shaped pendant made of electrum and set with an enormous fire opal. While wearing this amulet, you gain immunity to fire damage and you can cast the create bonfire cantrip at will as if an 11th-level caster (no concentration required).

The amulet has 3 charges. You can use an action to expend 1 charge and cast the fire storm spell. The amulet regains 1d3 expended charges daily at dawn. Spells cast from the amulet have a save DC of 17.