Broken!

Severe abuse causes an enormous burst of accidental magic from which Harry learns to control the Dursleys. With their home as a casual base, he takes to the streets, thieving & improving his magic. Dumbledore-bashing. Dark retribution shocker. Grey nonreactive, noncompliant, anti-hero Harry. Friends. Fluff. Pairing. M-rated. Broken boy v powerful sanctimonious manipulative tyrant!