Dumbledore was speechless. He always felt Horatio had him firmly in the grip of his house-demolishing logic. Whenever he suggested tearing down the ceiling, Horatio always had a backup plan to blow up the entire house—and the key was that he could actually do it.
No, I can't let him keep controlling me like this. Dumbledore decisively said, "Fine, but you must make sure the prisoners of Azkaban don't cause trouble."
The adult world was always full of helplessness and compromise. Horatio, you little brat, still had a long way to go.
Horatio wore an expression that said, Just as expected. Controlling Dumbledore was as easy as F-someone controlling a certain region in a certain tournament—perhaps even easier.
"Then I'll move Azkaban to Black Lake." Horatio slapped both hands onto the ground. "Azkaban, move out!!"
As Horatio's words fell, everyone inside the prison instantly felt the earth shake and the mountains tremble. Before the stunned eyes of Dumbledore and Grindelwald, Azkaban stood up.
They exchanged glances, not knowing what to say. It was obvious at a glance that this magic combined Alchemy and Transfiguration. The fact that Horatio could combine them showed that even without considering the Dark Arts or his strange inventions, he was an extremely troublesome opponent. Greatness needed no extra salt.
Horatio opened a Portal to an island in Black Lake. Azkaban marched through it step by heavy step toward the island, finally crouching down in the center of it.
After finishing all this, Horatio had the Dementors escort the bewildered prisoners to the first-floor hall. Standing on the second floor, he cleared his throat and loudly announced through an Amplification Charm.
"My dear test subjects, after friendly negotiations with Headmaster Dumbledore, Azkaban has now been incorporated into Hogwarts and will become the fifth house.
"Unfortunately, I