As an action, the flesh of a creature that you can touch or see within 10 meters contorts and stretches as growing mouths filled with rows of sharp teeth and hands with vicious claws tear into its flesh. At the start of each of its turns for the duration, the creature must make a Fortitude saving throw.

On a failure, it takes 4d6 slashing damage.

On a critical failure, it takes twice as much damage.

On a success, it takes half as much damage and and the effect ends.

On a critical success, it takes no damage and the effect ends.

Augment

You can increase the damage by 4d6 for each additional mana expended.