Harry Potter and the Legend of the Temple

Fifteen hundred years ago, Merlin chose to leave the temple inheritance in order to fight against the renewed attack of the dark power. Fifteen hundred years later, a young man traveled from another world, but got involved in various disputes.
What? Dumbledore wants me to destroy the Horcruxes? Sorry, I kept it for future use.
What? Voldemort wants to call me brother? Sorry, I don't get along with people without noses.
Grindelwald was very happy after hearing this and taught me his favorite gas stove magic.
Slytherin expressed his helplessness, wondering how he got into this thing.