Sky Hammer

The sturdy head of this +3 major striking Flaming Shock orichalcum warhammer is shaped like a blazing comet.

Activate—Comet Fall [R] (concentration)

Trigger Your attack roll with the sky hammer is a critical success

Effect A 6th-rank arcane Fireball spell explodes, centered on the sky hammer. The spell DC is 45. You are immune to the fireball's effect, though your allies are not.

Craft Requirements Supply a casting of fireball (6th rank), and the initial raw materials must include 12,375 gp of orichalcum.