William didn't use his Holy Sword technique except for when he trained on it at the academy headmaster's place, and when he fought against the fierce worm.
But he learnt a few things about his technique. First and foremost was that his technique wasn't rigid! He tried and succeeded in dividing up the arcs of lights before, making them land over the two parts of that worm.
And he also learnt a trick from his other technique, the lightning fast moving one. He could break up the jump, making his body not move in a straight line, but in a zigzag path that could let him jump between dots with fixed distance in between.
Right now, William put all his past experience and lessons he learnt from before and executed a version of his new technique that he never tested before!
