Dragons Breath

You touch one willing creature and imbue it
with the power to spew magical energy from
its mouth, provided it has one. Choose acid,
cold, fire, lightning, or poison. Until the spell
ends, the creature can use an action to exhale
energy of the chosen type in a 15-foot cone.
Each creature in that area must make a
Dexterity saving throw, taking 3d6 damage
of the chosen type on a failed save, or half as
much damage on a successful one.