Destructive Wave

You strike the ground, creating a burst of divine
energy that ripples outward from you.
Each creature you choose within 30 ft of you
makes a Con save. A creature takes 5d6 thunder
as well as 5d6 radiant or necrotic damage (your
choice), and is knocked prone on a failure.
A creature that succeeds takes half as much
damage and isn't knocked prone.