As two actions, you unleash a virulent disease on a creature that you can touch or see within 10 meters. The creature must make a Fortitude saving throw.
On a failure, it takes 3d10 necrotic damage.
On a critical failure, it takes twice as much damage.
On a success, it takes half as much damage.
On a critical success, it takes no 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 3d10 for each additional mana expended.