Dragonflame

The records of the battle speak only of rolling smoke and of dragonflame mixed with the white fire of the three Ancients.

She felt her skin pop and eyes melt in the blast of dragonflame, and the snapping of her bones as his teeth skewered her—

Already weakened by blasts of dragonflame, the dome cracked under the force of impact, and a moment later half of it came tumbling down, crushing both dragon and dragonslayers under tons of broken stone and rubble.