As an action, you draw the moisture from every creature in a sphere centered on a point you choose within 36 meters. Each creature in that area must make a Fortitude saving throw. Constructs and undead aren’t affected, and plants and water elementals make this saving throw with disadvantage. A creature takes 7d6 necrotic damage on a failed save, or half as much damage on a successful one.
You can increase the damage by 2d6 for each additional mana or psi expended.