At this stage, such fusion is an essential process in creating the Immortal Dynasty.
For the old Emperor, the emergence of the Immortal Dynasty offered him a brand new mode of governance. He could control everything in the Mortal World indirectly through the Immortal Dynasty. Moreover, he could step back into the shadows and become the pivotal figure who oversees everything from a distance.
Of course, the old Emperor also understood that it was unrealistic for one person to hold all the power within the Immortal Dynasty. Delegating power to various factions was an inevitable choice. However, as long as interests were cleverly entwined to form an unbreakable common interest community, the cycles of rise and fall of ordinary dynasties would find it difficult to shake the foundations of the Immortal Dynasty.