Considering that this man apparently lived for centuries if not thousands of years, I imagine that he just generally has magic for cellular control and such. Apparently their society had fusion reactors...so yeah hair follicle control isn't too weird.
Bringing 5 people to the rematch is so damn cocky of him. Let's say the 1st academy students did learn chantless magic, I don't think those 5 would stand a chance.
@fortnog Manga doesn't mention it, but they'd already investigated the status of 1st academy (which is why the king was there to have the principal arrested/beheaded), so they already knew that 5 people could overpower their entire team.
just....seriously just execute those assholes
the country is about to be attacking by an army of demons and these 1st academy people still trashing about