Killing the harbringer for the end of days, https://www.wowhead.com/npc=150859/zaqul was a multi-realm story. And of course we all have seen too much hentai to know where this was going.
(https://www.infinite-guild.eu/upload/smfpics/bfa/tep/zaqulmbig.jpg)
https://www.youtube.com/watch?v=zVj_UDZQnU8