Of course, that wasn't the sole reason behind this. William was able to control his dash. He could make a single jump deal with three foes at least at the same time, if not more if he spent a little more of his spirit power to deal with more enemies around.
Even when more monsters flooded this place from the forest around, William was able to keep up. For a second there, William lost his feelings of what he was doing and what was going on around and got himself deeply immersed in such a melancholic feeling.
"This power… This might… The feeling of being like a god fighting mortals… I truly miss such a feeling…" It was the same old feeling he got when he used to fight back when he was at the pinnacle of his power in his past life.
And thanks to getting deeply immersed in this feeling, he kept attacking unceasingly for five more minutes straight.