The winter tournament was one of the most important tournaments from a house's perspective: the battle royale was one of the most competitive, innovative, and co-operative event amongst all the other house events.
The battle royale saw 1st, 2nd, and 3rd year students participate together in the event as a house and fight to be the last house standing on the martial platform.
The martial platform was built on the fifth hill of the school and it was a 25km² by 25km² platform, floating 100 meters from the ground.
To eliminate an opponent, one had to send them hurling over the stage, and once they fell over 50 meters, they would be teleported to the observation stands. One could only be eliminated this way.
The battle royale style had no other rules, and everything was fair until it did not involve critically crippling an enemy or killing them.