As an action, a creature that isn’t a construct or undead that you can touch or see within 18 meters must make a Fortitude saving throw.
On a failed save, you siphon life force to heal your wounds as it takes 3d8 necrotic damage.
On a successful save, it takes half as much damage.
You regain health equal to half the amount of necrotic damage dealt.
You can increase the damage by 4d8 for each additional mana or psi expended.