Dark Metamorphosis

Using your own blood as a catalyst, you embue your weapon with the power to drain the life essence of your enemies.

When you cast the spell, roll your weapon''s damage against yourself. For the duration, any time your attacks extract blood from an enemy, you regain hit points equal to half the damage dealt.

This spell only works on living creatures that have blood. It doesn't have any effect on plants, undead, constructs or elementals.