Amethyst
Condition: normal / HP: 1
"Right. So all the usual things nanomachines are weak to, like EMP, radiation and heat, can't be used. Looks like it's time to fight fire with fire!"
A missile warps in from hyperspace and releases a shower of powdery, white dust over the nanite-infected servers. Trillions of counter-nanites descend in a fine mist, microscopic machines built to seek out and destroy other nanites. Upon contact, they rapidly proliferate and differentiate into dozens of variants adapted to eliminate whatever nanobots were encountered. Some invade other nanomachines to comandeer their machinery and destroy them from within, like bacteriophages are to bacteria. Others attack them mechanically and chemically, swallowing them whole or releasing powerful oxidants and corrosives, dissecting enemies with picoscale lasers or monomolecular blades. And when there was nothing left to destroy, they would silently self-destruct, leaving behind only a fine silicone dust.
Best of all, while normal nanites depend on energy available in the environment or the substrate they grow, these use energy beamed from her suit. All she had to do was leave, and they'd deactivate - there was zero chance of a runway grey goo incident. Amethyst had made these for cleaning up all the nanotechnology that got thrown around in modern supervillain plots, so they ought to come in handy here, too.
OOC
Stunt the following power off the primary array
"Counter-Nanites" Nullify nanomachines 11 (Increased duration: concentration +1) 22pp
With the descriptor of nanites.
Then use it to disable the nanomachines infecting the server as a standard action
I think I need a power check to use nullify, so here is one.
AA Amethyst power check: 1D20+11 = [4]+11 = 15