Draconic Atomic

Prerequisite: Half Dragon or Dragonborn

 You gain a number of charges equal to your proficiency bonus. 

 When you use your dragons breathe you may choose one:

Instead of exhaling destructive energy, as a bonus action you can expend a charge, forcing each creature of your choice within 30 feet of you to make a Wisdom saving throw (DC 8 + your proficiency bonus + your Constitution modifier). A target automatically succeeds on the save if it can’t hear or see you. On a failed save, a target becomes frightened of you for 1 minute. If the frightened target takes any damage, it can repeat the saving throw, ending the effect on itself on a success.

You can expend all remaining charges to increase the damage of your breathe weapon by an additional 1d6 for each charge used.

You regain all spent charges after finishing a long rest.