If killed by Soren, one really could never be resurrected again.
Yeenoghu's death represented the end of the gnolls. From today onward, gnolls were no longer one of the powerful ethnic groups in the Abyss. After losing Yeenoghu's support, the Abyssal Gnolls would soon suffer blows from demons and other races. The 422nd Layer of the Abyss was not territory that Soren needed, so the demon avatar relinquished a portion of the spoils in the final distribution of interests, merely retaining ownership of the Gathering Gate and dispatching a powerful demon legion to garrison here. The Succubus Queen acquired the reward she wanted and eradicated her long-standing enemy, but she also needed to pay a price, such as the cancellation of a certain very important mark.
Soran gained the Minotaur King's respect, but the laws of the Abyss dictated that demon lords found it difficult to thoroughly unite.
After eliminating Yeenoghu, Soran's greatest gain was acquiring a large batch of human slaves. He was by no means a philanthropist and could not possibly let these humans leave.
Therefore, Soran incorporated these humans and figured out a way to transport them to the Realm of the Forgottens on the third layer of the Abyss. Humans were slightly different from demons; although weak, they possessed strong plasticity. There were many places in the Realm of the Forgottens that had use for them, and humans were very adept at construction, capable of helping Soran to perfect the Gurumba Arena.
The number of humans totaled over ten thousand.
A portion of them were purely slaves who had never received any education and looked just like barbarians, meaning they could only serve as a group of coolies.
Another portion had been plundered from other planes by the Gnoll King, Yeenoghu; they had received an education