Herald killed, Earthsplitter pursued and taken by Skallywag Squad. On the way, Nexus Encephalon influences in Rookmore purged. This is the start of the plot to shatter the sky.
Nexus Encephalon influence in Sedesend (Ereus Sol'ahn) subdued, and imprisonment of Ereus, sparking conflict. Earthsplitter handed off to Amalar Crys. This turns many gears in the world to transition for what comes next.
Next level of Nexus Encephalon encountered and defeated in Umbradeep, saving Qir'ellan'alak, significantly impacting plan to emerge Mother. Discovery of Trennen Faedis and the Codas along the way. These give the feeling of victory, of pushing back this currently unknown force.
Battle of the Bards, and the freeing of Ereus Sol'ahn by the Chrysun Gales, officially starting war between Chrysun Gales and Olessar. Meanwhile, another plot to crack the Ends of Empyrean is (mostly) stopped in the Isles of Reus, and Lodd only managed to get a crack in the sky with his explosive death. Plan is inching forward, and the last resort is crystallizing.
Death of Morgo the Maleficent, and the reconvening of the Skallywag Squad could be turning point. Neznámy is the opportunity needed: a direct line with the Deities to use Earthsplitter and open the way for Mother. This is the endgame of the main plan.
Hunting down aspects of the Nexus Encephalon, their thoughts would reveal true mastermind. Allies in Tower or Chimerazon would also impede the plan.
Lvl 17: Defeating Mother with divine power, clashing of primordial and divine would explode and shatter the compromised Ends of Empyrean, allowing Deities to return. All out war between Diviners and Ryvers, just like the Cataclysm, is staged.
Lvl 18 - 20: Re-established the Ends of Empyrean or driving away the leading Deity would stop the conflict. Kill/defeat god, end game.