John Watson and the Wizarding World

John walks in on Sherlock and a boggart, and everything goes down hill from there. Moriarty is back. Harry struggles to run the Order and care for his Godson Teddy. Neville, a leading Herbologist and Hogwarts professor works with Snape grudgingly, and the Wizarding World fears that Moriarty will be a second Voldemort. Crossover. Potterlock. Neville/Molly. Mystrade.