Eruption

You invoke the powers of the earth to aid you in battle. For the next minute, whenever an opponent hits you with an attack, an explosion of rock and fire erupts in a 10 ft. radius, centered on you. Each creature within this radius must make a DC 14 Dexterity saving throw, taking 2d8 fire damage and 3d6 bludgeoning damage, or half as much damage on a successful one. Once the spell is triggered, it’s effects end.