07/30/2013 02:03 AMPosted by Elsantothe reason why diablo are not killing the aspects themselves is because they're opposing forces, only way for one side to win over the other side is for them to kill the very essence of the side, in angels' side,, it's the Crystal Arch, as for the darkness side, each lord of hell has their own soul stone.
the soul stone were made to contain the soul of one of the primes. that being said it was meant to be a jail for them but that is before someone tolled them how to corrupt the soul stones. i believe the black abyss is there Ver of the crystal arch. and from what i got from the lore the crystal arch and black abyss act as an so called re spawn for the powers of heaven and hell the soul stones were meant to keep them from coming back after they were defeated