Alexander Potter's Wizarding World - Philosopher's Stone

Alexander Potter was adopted by Harry Potter's parents until Voldemort murdered them and tries to kill Harry but the Killing Curse rebounded back to him and he was dead. Alexander Potter was kept in care by the Muggleborn wizard, Walter Lawson. On the day before his third year begins at Hogwarts, he met Harry Potter at last and discovered what secrets that Dumbledore put something in the third floor corridor.