Di Jiu took out the Primeval Thunder Rock. Since it contained an endless thunder faculty law, he wanted to make use of it to allow the thunder faculty law array flags he set up to be more powerful. There were simply too many level-nine immortal demon beasts. Otherwise, he would not take the huge risk to charge out of the Gigantic Tripod Liberal Immortal City.
Once such a terrifying Beast Tide drowned the city, he might not necessarily be able to leave 100 percent, even if he used his Spiritual Force escape technique.
However, when Di Jiu used his Spiritual Force to connect to the Primeval Thunder Rock, he was startled by the thunder element aura it contained.
He had attempted to refine the Primeval Thunder Rock in the past, but it had been of no use. Now, he could sense its first layer of restriction.