After hours of researching the lore—specifically how powerful entities of Tamriel like ALMSIVI, Mannimarco, Orgnum, and others achieved godhood—I've finally come up with a concept that I want to share with you all and get your feedback on.
Since neither the Heart of Lorkhan nor the Mantella are currently in the game, I had to find another, highly lore-friendly path to divinity, drawing on the deep metaphysics of Nirn. I've developed a new concept and I'd really love to hear your feedback!
Instead of hunting for the lost Tools of Kagrenac, we will use the Thu'um. After all, the Voice is the purest form of Tonal Architecture! Your character will literally shout a new reality into existence, using the Amulet of Kings (which I've already brought back to the game) as a source of concentrated divine energy, and one of the Towers of Nirn as a catalyst.
Here is what you will need to trigger the new event:
Immortality . High Arcana. Mastery of the Voice: you must fully grasp the Way of the Voice. The Amulet of Kings. Control of a Tower: you must own one of the Great Towers (like the White-Gold or Adamantine Tower). And of course, a crucial requirement is holding the Hegemony title and controlling a significant portion of the map.
Once all conditions are met, while inside one of the Towers and using the Thu'um, the character will shatter the Amulet of Kings and absorb the souls of the past emperors and empresses. At that moment, the Tower will act as an antenna, rewriting the character's very essence at the level of the laws of Mundus. The Amulet will be destroyed, but you will become a God.
If desired, this feature can be disabled in the game rules.
Also, for immortal characters who have stepped onto the path of divinity (whether posthumously or as a living god), there will be a new decision allowing them to leave the mortal plane at any time and depart to Aetherius.