Black Hole draws power from a different dimension. It is capable of scrapping away the space and stop shots.
Black Hole is a two part shot - first Tokugawa swings once to open up a hole in space, and once the ball enters that hole it's completely nullified. Then he swings a second time to strike it back.
Black Hole requires a very well-trained body and comes with severe side effects, so it can only be used for 30 minutes.