As an action, sickening greenish energy lashes out toward a creature within 10 meters. The creature must make a Fortitude saving throw.
On a failure, it takes 3d10 poison damage and is poisoned for the duration.
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 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 4d10 for each additional mana expended.