After his parents died , Rudra 's approach in Omega changed significantly.
One of the best things that happened to him was that he was able to break free from the illusion of the demon's diary as it was no longer able to manipulate him.
He was sure that he did not want any personal gains from the diary, and honestly surrendered the books cover to Hades.
With him gifting the complete book to Hades , it was now possible for the god of death to start taking back of the demon race once more and land a huge blow to Lucifer.
Hades was incredibly impressed by Rudra who managed to bring the complete demons diary to him , as with this he finally felt like he had the chance to Lucifer down in a fair fight.
Using the demon's diary, Hades could create the demon kings who would be peak tier 5 existances who could aid him massively in the war effort with the future potential to reach even tier 6.