Ring of Thundering Hooves

Each creature in a 15-foot cube originating from
you must make a Constitution saving throw.
On a failed save, a creature takes 3d8 thunder
damage and is pushed 10 feet away from you.
On a successful save the creature takes half as
much damage and isn't pushed. Unsecured
objects in the area are pushed 10 feet.
Activating the ring emits the sound of a stampede
up to 300ft. Recharges every day at dawn.