Thunder Heart

The sound of the caster's heatbeat detonates outwards in two beats, Thump-Thump

For the 1st: Each creature in a 5-foot Emanation originating from the caster must succeed on a Constitution saving throw or take 1d6 Thunder damage. No damage on a successful save.

Using a Higher-Level Spell Slot. The damage increases by 1d6 for each level above 3rd.

For the 2nd: Each creature in a 15-foot Cone originating from the caster must succeed on a Constitution saving throw or take 2d8 Thunder damage, be deafened for 1 minute, and be pushed back 10 feet. Half-damage only on a successful save.

Using a Higher-Level Spell Slot. The damage increases by 1d8 for each level above 3rd.

The thunderous heart beat can be heard 300 feet away from the caster.