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 release a wave of burning soul energy, engulfing everything around you. All creatures in a 20-foot radius Sphere centered on you, including you, must make a Dexterity saving throw. A creature takes 6d8 Radiant damage and 3d8 Necrotic damage on a failed save or half as much on a successful one. You automatically fail this saving throw.

Using a Higher-Level Spell Slot. The Radiant and Necrotic damage each increases by 1d8 for each spell slot level above 4.

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