The Virtual Dark World was a nightmarish mirror of the living's Virtual Star World, accessible only to Dark Beings through their Dark Soul Rings.
It was a sprawling, ever-shifting realm of shadow and malice, governed by the Undying Will—a sentient AI like the SAAI!
Furthermore, only the faction leaders can summon the Undying Will when the Dead Faction faces trouble, and the Soulless Ghost King attacking his own faction is a huge matter.
If Jacob had only killed some lesser Dark Beings within the boundary of Three Steps of Legend or below, it wouldn't been a huge deal, but killing Legendary Nobles was a huge matter!
This gave the Blood Doom King, Wilbur, and Underwood Fiend King, Underwood, enough reason to initiate this meeting and summon the Undying Will to punish the Soulless Ghost King!
It doesn't matter to them if he had his reason or if someone had offended him first; they wanted to see him suffer!