Of all that changes over the history of time, one asset of existence has remained a constant reminder of the futility of physical existence - Death. Our vessels, despite whatever alternate forms they take through rigorous training or magical allocations, have proven themselves to be inefficient in the grand scheme of the Multiverse when compared to those of the Divine, fallen and newly awakened.
While the Aetherian Pantheon has fallen, we realize that they were not truly destroyed in essence. Their spiritual embodiment torn asunder into lesser pieces, leaving us with lesser unidentified creations only shows us that there is an immortal, indestructible, and immemorial aspect to the Spirit, and the Cult of Transubstantiation seeks to harness it. The keys to the lock remains in the Underworld, where there no longer stands a ruler to dictate those who will transubstantiate themselves from its power.
It is the Age of Mortals, and while the Aetherian kind has progressed into greater physical achievements and callings, even raising up Sects with divine entities, we believe the time has come that we look to ourselves as the key players in global crises and conquest. It is time for us Mortals to ascend and use what was left behind by our fallen Gods to our gain.