As an action, corrosive acid eats away at one creature that you can touch or see within 18 meters. At the start of each of its turns while affected by this spell, the creature must make a Fortitude saving throw.
On a failed save, the target takes 4d6 acid damage.
On a successful save, the target takes half as much damage and the effect ends.
You can increase the damage by 6d6 for each additional mana or psi expended.