I'm looking for a story where Tom and Harry find themselves in a universe in which each person has an ability that is a spell in the Harry Potter universe. Harry was the Imperious, Tom was an empath, Bellatrix had the Cruciatus curse, Minerva was the bodybind (i think). Harry and Tom avoided the Order but ended up at Hogwarts before I lost track of the fic.
Summary: Harry's got the Imperius Curse tripping off his tongue and Tom's suddenly acutely aware of other people's emotions.
Harry screams. And screams and screams and-- The hurt is gone so suddenly he gasps at the loss of it. It feels like he had been born from the pain, that it was all he knows and the world comes back to him in bits and pieces. He's on the ground, sweaty and dishevelled and his throat is raw. Bellatrix leans over him, tone a croon as she reaches out, trailing one fingernail down Harry's jawline. "That's right," she simpers, "You get the Imperius, I get the Cruciatus." Harry shudders involuntary, nerve endings still on fire and her nail curls cruelly, digging into flesh and tearing through the skin sharply enough to draw blood.