Vibrating Humors

As part of casting this spell, you must expend one Hit Die or the spell automatically fails.

A creature you can see within 30 feet of you must make a Constitution saving throw. On a failed save, the target takes Thunder damage and has Disadvantage on Dexterity (Stealth) checks from its blood vibrating loudly. To determine this damage, roll the Hit Point Die expended to cast this spell. The target repeats the save at the end of each of turns, ending the spell on a success.

Using a Higher-Level Spell Slot. You increase the damage by expending an additional Hit Die for each spell slot level above 1.

Level 1 Evocation (Sangromancy) (Bard, Sorcerer, Wizard)

Casting Time: Action
Range: 30 feet
Components: V, S, M (a tuning fork)
Duration: Concentration, up to 1 minute