Ning gave Nova the technique. It wasn't a read and learn kind of technique, but rather one that was directly taught to them at once.
The system installed the technique and the way to use it directly onto Nova's broken soul as a system would to a normal soul.
Nova's soul was already broken and this was her last life, so Ning saw nothing wrong with what it was doing. In fact, it was helping her in ways that no other could.
Ning couldn't even imagine Nova winning the competition and gaining the system only for her soul to fade away because it could not handle any more breaking.
Ning shook his head and told Nova what he had just done.
"You… you fixed me?" she asked while looking at Ning who himself needed a fixing.
Ning's body was still wrecked from the inside due to the massive amount of energy that was in the system itself.
