Been There Done ThatExperiment Gone Wrong!

76 year old Harry Potter is now headmaster and considered the greatest wizard of his time since Voldemort and Dumbledore. He finds some of Dumbledore's old diaries and the fabled Philosopher Stone, he had other plans on Harry's future. When and old friend contacts him about a experiment gone wrong. He's about to be in the shock of his life or lives. His best adventure to come.