A time when the Piglins live in the Bastion and before being survivors ,in the bastion live a soul called The Host and his two sons Rib and Snout,later he have the idea of create a new type of armor for his Piglin Brutes, after smelting the trims he called they Snout and Rib. After all the process a hoglin escaped from the stable and exit Nether in one of the connections(now known as Ruined Portals)and the exit have terrible effects on him,in the return he go mad The Eye and his archers(now known as Wither Skeletons). The Eye (now Wither)after go mad destroyed the connections to prevent exit all the Piglins and freeed his Ghasts(lost souls of the Desert Temple,who have a strong connection with Nether)and the Magma Cubes,slices of the broken trims(There only were 10 and 2 were broken,and only remain 4 Snout and 4 Rib). Later destroyng all he went to the sand(Now called Soul Sand). Before that the Piglins worked on a material called Debris perfect for The Eye,who always wanted an armor,now the Debris was destroyed and no more remain,i hope you find and rebuild Nether.