School of Soul Magic. Casting this spell requires expending a number of Soul Shards equal to the level of the spell. Any character without Soul Shards who attempts to cast this spell immediately drops to 0 Hit Points after casting it and begins making Death Saving Throws. Their Hit Points can only be increased once they have stabilized and can only be stabilized by succeeding on three Death Saving Throws. If they die while in this state, they cannot be revived by any means short of a Wish spell.

You sacrifice a portion of your soul to unleash devastating magic. Choose one creature you can see within range to make a Charisma saving throw or take 8d10 Necrotic damage or half as much on a success. You and the target also suffer 2 levels of Exhaustion on a failed save and your Hit Point Maximum is reduced by half the damage dealt until you finish a Long Rest.

Using a Higher-Level Spell Slot. The damage increases by 1d10 for each spell slot level above 5.

This spell is intended for use with the Soulbreaker Wizard Homebrew Subclass.