Aspects of the Crucible: Breath

Your neck and upper chest swell grotesquely as a great luminous throat sac forms beneath your jaw. The organ glows from within like an amber furnace, expanding until it nearly covers the front of your torso.

You throw your head forward and release the stored heat as a roaring torrent of flame.

Each creature in a 30-foot cone must make a Dexterity saving throw, taking 4d6 Fire damage on a failed save or half as much damage on a successful one.

The throat sac contracts and disappears after the flames cease, leaving trails of glowing vapor around your mouth and shoulders.

Using a Higher-Level Spell Slot. The damage increases by 1d6 for each spell slot level above 2.