Deep in the bowels of Hogwarts, there is a room unlike any other. It has been enchanted by an unknown witch or wizard to connect Hogwarts with the castle of Camelot, for purposes yet uncertain. Crossing this bridge in time has consequences far beyond what Harry and Merlin could possibly imagine. AU set during series 1 and 2 of Merlin and books 1 and 5 of HP. Friendship only.