As two actions, a tendril of inky darkness reaches out from you. When you cast the spell—and once on on each of your turns thereafter as an action—the tendril can touch a creature that you can touch or see within 10 meters to drain life from it. The creature must make a Reflex saving throw. If the creature is a construct or an undead, the spell has no effect on it.

On a failure, it takes 2d10 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.

You regain health equal to half the amount of necrotic damage dealt.

Augment

You can increase the damage by 1d10 for each additional mana expended.