"I mean to begin with, in cosmic horror, you can only either get the bad end, or manage to delay the coming of the bad end for a few hundred years. You can't kill Cthulhu or Nyarlathotep, only stop the cultists from summoning them or temporarily prevent them from fully manifesting their avatar." Not really? Since all outer/other gods including Nyarlathotep are trapped thanks to Yogsothoth because him letting them out is Yog's equivalent to letting your arm eat you're leg and if Yog wanted to he could kill them by just completely encapsulating the void in his/her light but then that would just be his equivalent of eating you're own arm. The only way the other gods can get out is thanks to their worshippers trying to summon them and any one else who accidentally summons them like with Nyarlathotep's stone which is also orchestrated by Yog.