Dragon Soul

Your body absorbs a dragon scale, allowing you to launch yourself up to 100 feet into the air (and land without taking falling damage) and breathe a 60-foot cone that deals 20d6 incinerating damage. You can forgo 1 damage die to increase the cone by 10 feet, up to a maximum of 100 feet. Creatures in that area must make a Constitution saving throw, taking the full damage on a failure or half as much on a success.

Alternatively, you can breathe a line of flame 15 feet wide and 100 feet long that deals 30d6 damage. Creatures in that area must make a Dexterity saving throw, taking the full damage on a failure or half as much on a success.