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.

When a creature within range dies, you siphon its departing soul to gain Temporary Hit Points equal to 1d10 plus your spellcasting modifier and regain 1 Soul Shard. You cannot regain Hit Points until you complete a Short or Long Rest.

Using a Higher-Level Spell Slot. The Temporary Hit Points increase to 2d10 with a level 3–4 spell slot, 3d10 with a level 5–6 spell slot, and 4d10 with a level 7+ spell slot. 

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