As two actions, a creature that you can touch or see within 10 meters must make a Fortitude saving throw.
On a failed save, you unleash a virulent disease on it as it takes 7d10 necrotic damage.
On a successful save, it takes half as much damage.
The damage can’t reduce the target’s health below 1. If the target fails the saving throw, its maximum health is reduced for 1 hour by an amount equal to the necrotic damage it took. Any effect that removes a disease allows a creature’s maximum health to return to normal before that time passes.
You can increase the damage by 4d10 for each additional mana or psi expended.