The Martial Arts Tournament was something Raze had thought about, but there were many things he would need to do to enter it in the first place.
For one, the use of strong magic would change his hair color back to the bright white it once was, making his identity clear to the others.
Sure, they could change some of his facial features with masks and prosthetics for the day, but he still believed his white hair would be a clear giveaway.
However, thinking about it, if he was just going up against other students in the tournament, then it wouldn't be something he would have to worry about so much.
With his skills alone, he should have been able to best the others. It was how to get the others out of there later, which would have to be planned on a day-to-day basis to see what the situation was like.