They first improved the strength of his slash, by cutting weaker materials such as ply wood, then moved onto rusted copper, then to copper, choosing harder and harder materials until he could cut through anything as if it was cardboard. He was then told to work on his SOUL attacks, he tried squashing plastic bottles with desolate dive to increase its area and strength, and vengeful spirits accuracy and speed along with their cost of spirit. He even started throwing his Pale Nail and Mantis Claw so he could have more options. Then he trained his boost effect's accuracy by playing hopscotch, very time he made it flawlessly, the squares would get smaller and more spread out.
