Breath of the Dragon

When you take the Attack action on your turn,
you can replace one of the attacks with an
exhalation of draconic energy in either a 20-ft.
cone or a 30-ft. line that is 5 ft. wide. Each
creature in that area must make a DC 12
Dexterity saving throw or take 2D4 acid, cold,
fire, lightning, or poison damage.
You can use this twice per long rest. When you
have no uses available, you can spend 2 ki points
to use this again.