Amulet of Acrimony

A small platinum amulet with the face of Roth.
Requires attunement.
1 use per long rest.
As an action; summons forth a giant fiery
hammer centered on you. All targets within 20'
make a DEX save DC 16. Failure results in 8d6
fire damage and being pushed 10' away from you;
success takes half damage. You take half damage
in either situation as well.