The Mental Demon Realm was known for being a vicious, free-for-all place.
It had even invaded the Spiritual Realm once in the past. The Demon Gods that had appeared naturally all had tempers.
Demon Supremacy Wish Fulfillment had huge plans. He wanted to capture the Celestial Thearch and the other Immortals and Gods in one fell swoop. He might even have plans to break through the Netherheaven realm!
And after the Lord of the Void and Fang Yuan learned about the new changes, there was no way they would lay low.
For them, the Mental Demon Battlefield was a death ground. If they were not at their wit's end, they would not choose to confront Demon Supremacy Wish Fulfillment head-on.
Even for the Lord of the Void, after he saved most of his true body, he did not bring up the matter of saving his old friends any longer.
In contrast, he was very enthusiastic about undermining the Spiritual Realm now.