A bit of Playtale lore I'm making this because I want to make more things about it but I still working on the comic Dx (plus: I'll use translator in some parts, K?)
The Great Theater, ## years ago, It was a watershed moment during the dark ages of the multiverse. Peace has been restored, you could be a villian or hero, there was no conflicts inside the Great Theater
In a misterious day, That place ceased to exist... It was as if it had never existed ("bruh, this is gaster's theory reference!" I KNOW!) Nobody remembered, they had no idea that the Great Theater had ever even existed (curiosity, the time inside the Great Theater passes differently there than in the rest of the multiverse, it's like a time paradox lol)
One day (you'll see this on the comic) a monster called Sans, for some reason, the damn thing made a hole in his wall, and that hole became a rift between the Great Theater and the outside world... With that, the mysterious barrier was broken
The only ones who know about that infinite white void that seems devoid of any living beings is Sans (of course) and Asriel (why?! ASK THE DAMN SKELETON!!!)
+Plus: In the Great Theater exist a huge window that shows a different view every day, each view is from a different world, it's kinda a conection but at the same time not
