Ainz Ooal Gown and his NPCs get displaced from the Great Tomb of Nazarick by something. Scouting around Ainz sees that the wizard's world is a little more advanced than the New World and offers access to 21st century Earth. He decides that he will take over Hogwarts as a base.
He announces his intention and offers the folks at Hogwarts a chance to be staff and underlings. They decide to fight. Dumbledore is there and for grins, Voldemore and Grinwald are brought to the fight and convinced to save the Wizard's world from what seems a set of monsters. Their grievances are put aside.
Who takes it? Hope this isn't a stomp.