This might be considered the lamest battle he'd ever going to win in his entire life, but this was also the only way to win.
This spirit… It was something that no master should face and deal with! So he didn't mind having such a shameful memory, it was better than losing such a good master like Sloth or losing that dirty enemy.
"Kill him!" William felt his tails getting loose over that star, "Do it now or you'll die!"
"F*ck it!" Sloth wasn't having it easy though. He came here prepared with thorough intel about this man, knowing he was just at gold grade. But when he directly clashed against him, he was shocked to see someone on the same level of power as him.
As this was the case, and seeing how William was risking everything, even his life, to buy him little time to execute the task, Sloth didn't hesitate anymore.
He started to burn his life essence, in return for gaining a crazy amount of spirit power boost.