Dumbledore learned about what the dungeon climber was from Minerva.
He couldn't believe something so magical and unimaginable happened outside.
"To think that the Stark tower has become the tower dungeon for magical worlds. What an irony that Tony Stark himself didn't believe in anything but science… Now he must have opened his mind…"
Dumbledore laughed as he remembered the kid who said that witches and wizards weren't real.
Tony thought that they were just fictional characters. Now he had become what he didn't believe, The dungeon climber.
One with great potential at that.
Then Dumbledore remembered something and it came to the problem that made him feel much older than he already was.
"If muggles can do what witches and wizards can do. I don't know what those dark families would do. They might want to show the muggles their non-existence pride."
Dumbledore felt regret about choosing such an unpaying career path like Chief Warlock of the Wizengamot and the headmaster of Hogwarts.
He had been trying to prevent dark families from doing stupid things. They held a grudge from thousands of years ago.
From generations to generations.
And if they heard what muggle could do just like them after becoming a dungeon climber.
They would stop at nothing to claim the tower for themselves.
"So, that is why he gives off such a powerful presence."
The sorting hat calmed down after much consideration.
He thought that the system that made people into dungeon climbers that Minerva mentioned was messing with him.
He mistook two dragon gods inside Arthur as a system defense mechanism.
"I can't sort him. I couldn't even come near him before I pooped!"
The sorting hat shook his top hat. The magic inside him would be dissolved if he were to be put on his head.
Dumbledore heard that and closed his eyes and thought about what to do. Should he assign his house based on what he knew about him?
Well, that would be a little bit irresponsible.
"What house would you like to be assigned in?"
Dumbledore decided to ask him directly. He also told him what each house represents.
Arthur thought about it. Being assigned to a certain house meant lack of freedom.
He didn't want to stay at one place in Hogwarts. Hell, he would only be here for the next two or three weeks. He still wanted to climb the dungeon more.
"Can I not be assigned into any house?"
"Let me think about it first."
Dumbledore guessed that Arthur might come here to study for a short while before he returned to the muggle world.
"You can but you have to show us that you are capable enough to be an assistant professor."
Arthur was older than most students here and if he were to be assigned as assistant professor while studying magic. He could live anywhere he liked.
[Show him what you are capable of. Just simple dragon magic should blow his mind away.]
Arthur nodded then he conjured crimson fire into a spear. It was so condense that there was no silhouette.
"What great control over magic… A wandless magic at that…"
Dumbledore could also perform wandless magic but with just simple magic. He didn't know that the magic Arthur used was the most basic one he had in his arsenal.
"Is this enough? If not, I still have much more magic in offensive, defensive, and supportive."
Arthur learned every type of magic that both Great Red and Ophis knew and they were a lot. However, they only have knowledge in magic based on the DXD world.
There still many more magic they wanted to learn.
Dumbledore shook his head. He didn't need to show him any more than this.
Dumbledore then told Arthur what he had to do as assistant professor.
"You will be assigned as an assistant of Professor Severus Snape."
Arthur wanted to learn about potion in the first place but he couldn't believe that it was Snape who he was going to be his assistant.
…
Drago who was about to use the hidden passage only known by professors.
He bribed Gilderoy to tell him about the passage.
However, before he was about to use the hidden passage. He saw professor Minerva come back with a muggle.
He was curious and decided to eavesdrop on them. And he found that the muggle that Minerva brought with her was Arthur Leywin Stark, the powerful dungeon climber even he heard about him.
"Why does a dungeon climber want to come to Hogwarts… I have to tell my father about this…"
Drago had never been interested in what his father did. But lately he heard about many insulting words thrown at the muggles.
His father hated muggles, muggle born, half blood and always called them mudblood.
If he told him about what Dumbledore and Minerva did. Maybe he might get rewards.
'I can become a dungeon climber after that…'