William didn't just want to survive through this assault, he wanted revenge as well. In addition to that, he wanted to use this chance to flip tables over and prepare the stage for his newly established guild branch to rise.
In fact, he was appreciative of such an attack. If these forces didn't target him like this, he'd have no way to weaken them. Without such a blow, then it was expected that his guild branch would live through very hard times, struggling for so long against the various forces and their deep roots and dirty schemes.
But now? They presented their top fighters on a golden plate for him. And he wasn't that merciful to let them through without a proper punishment.
As he lacked spirit sense, he had to use a helping hand.
[Wow! I got the reports, and it happened just as you described before, hahahaha!] Lara finally returned to him after half an hour from the start of all this.