As an action, a black beam of enervating energy springs from your finger toward a creature within 18 meters who must make a Fortitude saving throw.
On a failed save, the target takes 3d10 necrotic damage and deals only half damage with weapon attacks until the spell ends.
On a successful save, the target takes half as much damage.
A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.
You can increase the damage by 5d10 for each additional mana or psi expended.