Blood

Blood necromancers, also known as sanguimancers, manipulate their own blood and the flowing blood of their enemies. Your thralls often resemble vampiric spawn or constructs of hardened blood.

Grave Spell Blood Infusion

Thrall Enhancement Your thralls are enhanced with a drop of your blood, and when they fall, your blood returns to you. Whenever a thrall is destroyed, you regain 1 Hit Point. At 5th level and every 4 levels thereafter, the amount of Hit Points you regain when a thrall is destroyed increases by 1.