Hadrian quickly established his rule over in the Defense class. The students now knew they had nothing to be afraid of the vampire teacher unless they got detention with him. Hadrian's detention wasn't like the other teachers, where you were sent to clean someplace. No, his punishments depended on how bad you screwed up.
For minor things, you only got out after answering questions from different subjects, not only Defense. If couldn't, one more question was added until you could answer them all. For more serious situations, like bullying, you had to go one on one with Hadrian. The Marauders learned to ton down on their pranks and stopped picking on the Slytherins so much after going through a trouncing on three different occasions.
The other teachers like his way of doing things and started doing the same. That had the side effect of less spell casting in the corridors, less bullying, and students passing more time studying since they didn't want to spend hours trying to answer questions on detentions.
It was three months into the term that Hadrian started a dueling club. After discussing with his colleagues, they decided to set up fifteen platforms with normal wards to prevent serious injuries.
"Now that you are here, let me give the rules. No dark magic is allowed. If I even think you thought about using it, the DMLE will be the least of your worries. By the way, dark magic corrupts and leads to extreme behavior and even insanity, you just need to look at Voldemort and his death eaters to know."
Some students looked angry at his remark, probably those of death eater families. Hadrian took notice of each one of them.
"Professor Flitwick and I will give a short demonstration of how dealing is on a professional level, and for those that don't know, Professor Flitwick used to be a dueling champion before teaching at Hogwarts."
As soon as the duel started, Hadrian stepped aside a curse and retaliated. Since it was a dueling demonstration, Hadrian was using a wand even though he didn't need one.
The spell was flying from one point of the platform to another. If it was a duel to the death, Hadrian would have used his superior physical abilities to end the duel, however, it was not and so he contented himself in using just magic.
The duel ended with a well-placed stupefy from Hadrian, followed by a restriction spell that immobilized the opponent. After a round of applause and once Flitwick was enervated, the students were separated into years and taught the basics of dueling.
Hadrian had to admit that even though he didn't give his all in the duel, it had been fun. Sure, he had memories of many fights, more challenging than the one against Flitwick but those memories had no emotion attached to them.
He had to admit that fighting was really fun.
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It was Hogsmead weekend and Hadrian was sitting at the Hog's Head, drinking a cup of firewhisky.
He listened to the conversations around, the customers whispering to each other. It was while looking at a sip from his cup that he heard the scream, and faster than anyone in the pub could comprehend Hadrian ran towards the sound.
Death Eaters waltzed around firing curses and hexes at anyone in their path. Hadrian grinned as he calmly walked in their direction, batting spells away. There were ten of them, so first Hadrian had an explosion charm on their feet, and while snow flew around he had already run next to one of them.
A second later an unconscious wizard lay on the ground. Next, bone-breakers and cutting curses found three targets, and while they went down in pain Hadrian sent restriction spells on the rest of the group and took another five.
The last death eater just stood paralyzed in panic, as if he couldn't comprehend what was happening in front of his eyes. His last thought before going unconscious was about how he had screwed up.
The residents and students who had gone hiding finally come out once they saw that it was safe. They cheered and applauded, but Hadrian wasn't having any of it.
"Why didn't you fight back!?" His voice wasn't loud but everyone there heard him and went silent. "There were ten of them and almost a hundred of you. If you simply raised your wands and cast a simple stupefy, no matter how strong their shield was, you would have won. This time you were lucky I was here, but next time you might not be so."
With that somber warning, Hadrian levitated the death eaters and walked away, heading back for Hog's Head. Later, Aurors would come to take away the death eaters for questioning, and they would give so any names for more imprisonments.
The next day the Daily Prophet would have an article about the battle in Hogsmead, and Hadrian's words would give wizards and witches something to think about. Slowly, the population was changing from sheep to wolves.
While in Hogwarts, Hadrian wondered if Voldemort was spitting blood in anger...