Harry stepped close, still fighting hard to control his rage with deep breathing. "Horcrux creation is one of the most advanced pieces of wizardry ever conceived, no matter how devious the purpose. But what Tom Riddle has done with his lost Horcrux is to take that to a whole new level. He’s introduced integrated magic, linked his Horcrux Protectors together and powered them from elaborate sources. We don’t know enough about it to know what happens if we simply cut the power ... but that’s exactly what you’ve done ... and hapless Lucy Dursley is suffering for it."