Level 18 in Netrunner, Subclass Scarlet Runner
As an action, you create a 6-meter cube filled with your nanites. The outer edge of this cube needs to be within 6 meters of you. You can extend this distance by the use of distant spell. Each creature within the cube must make a Constitution saving throw. On a failed save, a creature takes 5d8 necrotic damage. On a successful save, the creature takes half as much damage. Any object within the cube gets consumed and destroyed beyond repair. Once you use this feature, you can't do so again until you finish a long rest, unless you spend 7 nanite points to use it again.