You have consumed the heart of a dragon, imbuing your body with its power. As an action, you can release this power in a 90-foot line that is 5 feet wide. Each creature in that line must make a DC19 Dexterity saving throw, taking 16d10 lightning or necrotic damage on a failed save, or half as much on a successful one.
You can use this feature once, regaining its use at the end of a long rest.
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