Speck
Speck is an arc from the Worm series. It is preceded by Venom and followed by Teneral.
Summary
The impromptu brain surgery Taylor requested from Panacea has taken her power to new heights, but at a steep cost. Armed with the ability to utterly control other people, but stripped of the power to explain her intentions or coordinate with allies, she'll have to overcome the available parahumans of several Earths, the alien intelligence behind Scion, and her own deteriorating mind and body in order to save humanity and survive the experience.