Battle of Hogwarts

The outside world is shrouded in fog and filled with all kinds of monsters, leaving only Hogwarts, a pure land. However, the safest place in the world is also full of dangers: powerful enemies that are transmitted regularly, cracks in time and space that may appear at any time, and an army of monsters that constantly gather and attack the castle... If you want to solve the end of the world, you must go deep into the fog and defeat the monster leader. Can only a few professors and a group of students at Hogwarts save the world? The remnant soul of Voldemort, who was about to lose himself after being corroded, said: "Hey, principal, save me!" Dumbledore: "Tom? (No Mercy)"