The three great Chaos Treasures served as vehicles for reincarnation, a manifestation of the Way, evolving the three kinds of power into the form of the three great treasures. Even if Jiang Chen could not fuse them into one in the future, he could still substantially enhance his combat prowess.
After all, the three great Chaos Treasures themselves represented the highest echelons of beginning and end, and of creation and transformation. There was nothing higher than them. Directly condensing the supreme form of the Way, it was easy to imagine the enhancement it could bring to combat power, at the very least being invincible within the same realm.
If, in the future, Jiang Chen could truly achieve the fusion of these three Chaos Treasure-derived Dao Rhymes as he envisioned, then he could transform into the master of reincarnation, and would be entitled to preside over it.