Rod

Very Rare

Two fiery opals are set in the surface of this key-shaped rod. By expending one charge, a fire opal will be extinguished and a bright streak will flash from the rod to a point you choose within range. This streaking mote then blossoms with a low roar into an explosion of flame. Each creature in a 20-foot-radius sphere centered on that point must make a Dexterity DC17 saving throw. A target takes 8d6 fire damage on a failed save, or half as much on a successful one.   The fire spreads around corners. It ignites flammable objects in the area that aren't being worn or carried.   The fiery opals reignite each day at dawn, causing the Key to the Core to regain all of its expended charges.