To William, he entered this state while he was trying to fight lots of dark spirit masters that surrounded him and his team. And even after all these hours and hectic battles, he was sure he killed lots of them, enough to let his team run away safely.
If they didn't do it, that meant there was a new variable out there, or even variables. William tried to think of many scenarios but failed to guess the right thing.
How could he guess that his little adventure here attracted the attention of both his allies and enemies alike? And out of his expectations, the scale of this battle grew bigger, much bigger than he'd even hope to.
But even if he knew, he wouldn't feel anything but getting extremely thrilled by this. This wasn't something he didn't want to see happening. And if things kept rolling down this path, the end result would be for most if not all of the dark forces here to get killed or routed away from here.
