I’ve amended my theory after looking back at Diablo 2 and 3 story lines.
When we defeat Diablo in heaven and he falls to earth in the soul stone. The soul stone infects the lands. That’s why tyrael and the others try to seal the soul stone in a crypt. But that sealing was the wrong move.
Let me explain. By sealing the soul stone to sanctuary, it allowed Diablo to raise his realm of Chaos Sanctuary from hell, or allowed him to reshape sanctuary in his image, making it his new chaos sanctuary.
From the second they seal the stone, fear is what comes. The angelic repear changes sides and inflicts the deepest levels of fear into the realms of man and angel alike.
Let’s get to Diablo 4:
Lilith’s fears are realized throughout the campaign. Though she grants power to her servants it’s never enough to actually protect them or liberate them.
She watches her son die, helplessly. To her only ally and her son’s father.
Inarius literally by prophecy was suppose to win. His worst fears were realized throughout campaign. He thought heaven would let him back in, when he realized they were silent as Lilith said, inarius was infected with terror and fear. It was his fear of heavens judgment that forced him to kill his son.
The important part is both inarius and Lilith are consumed by fear before they “enter hell” both of their ambitions in Diablo 4 are entirely driven by fear.
Even lorath’s fears are realized with Nyrelle. But lorath seems fully detached from fear, which makes me suspicious that the lorath we see isn’t actually the real deal.
Lorath is the only character that seems uneffected by the global fear buff that effects every inch of sanctuary with a “human” to interact with.
I still heavily believe that Diablo 4’s version of cow level is actually us recreating terrors end somehow.
I believe the template quest chain is Diablo 4’s version of terrors end. If you are unaware of template quest chain, please don’t troll me until you check it out for yourself.
For those of you that don’t know, false liberation is by definition the most powerful form of fear torture.