Harvesting Nanites

Level18

Your nanites allow you to reach inside an enemy and remove vital organs, potentially killing them outright. As a full action, you can spend a nanite surge to make a single unarmed strike, or attack with a weapon formed by your gear array, against a foe within your reach with a CR no greater than your level. If the attack hits, it deals damage as normal and the target must also succeed at a Fortitude saving throw or take 1d6 additional damage per your character level. If the target fails the save, it must also attempt a second Fortitude saving throw with the same DC. If it fails this second save, it dies instantly; this is a death effect. If the target has fortification against critical hits or a similar effect, the chance to treat a critical hit as a normal attack also applies to negating the additional damage and the saving throws.