Deafening Clarion

The sound of a thousand swords clashing bursts from your sword as you plunge it into the ground. Each creature within range must make a Constitution saving throw. Each creature in a 15-foot-radius sphere takes 3d8 thunder damage on a failed save, or half as much damage on a successful one. The next time you hit a creature within range who failed it's saving throw with a melee weapon attack, regain hit points equal to half of the damage dealt rounded down. The thundering clash of this spell can be heard up to 300 feet away.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the initial extra damage dealt by the attack increases by 1d8 for each slot above 3rd.