BONESHATTER

the target must succeed on a Constitution saving throw (8+casters proficiency bonus+ Spellcasting modifier)

The targets bones (or exoskeleton) splinter dealing "4d6" points of damage to the target, and dealing 1 point of exhaustion on a failed save. on a successful save the target still receives half damage and the exhaustion is negated.

At Higher Levels: When casted at a higher level add an additional 1d6 to the damage roll.