Before entering the dark gold grade, he wouldn't dare to confront such foes. And now he wasn't afraid from fighting against him.
"Let's see what you got then," the dark master started with a darkness technique that summoned a gigantic tornado of darkness that enveloped both of them, "in here, you are a mosquito waiting to get crushed…"
"Not on this day!" William didn't hesitate and turned back to one tail form, using the lightning technique, before dashing forward without caring for anything else.
He didn't need to kill that master now, and he doubted he had the ability to do so. But trying to survive and escape from here wasn't a problem for him. Using the nemesis spirit element against darkness, he managed to penetrate through that black tornado like a true bolt of lightning. And the gap he passed through got expanded and ate away a lot of that darkness.