What's a Cosmic Elemental Domain?
Spirit/Life for a Pandaria revisit is a great idea. I think Decay works incredibly well for Zandalar too, so a South Seas expansion could focus on Spirit vs Decay and the way they interact to influence Life and Death. I want the Elemental Plane to be destroyed and the Maelstrom calmed, resulting in a huge influx of Spirit and Decay and eventually the manifestation of Elemental Lords for Spirit and Decay. It really bothers me that Chronicle set them up to be equivalent to the other primal elements, but they don't function in the same way and have been neglected in-game since (we had Decay feature in Dragonflight, but I don't think it was ever referred to as an element or considered anywhere near equal to the four traditional primal elements).
The only existing enemy I can really see for Life is the nathrezim, and I think it would be a mistake on Blizzard's part to put them firmly into the Death box when we know they dabble in all of the forces and likely have nothing against Life specifically in the long run. I like the idea of Life's true enemy being technology- or magitek-based (in Warcraft 3 and vanilla WoW, Nature and Arcane magic were diametrically opposed and fought for resources), but where could they come from? There are a lot of options:
- a faction associated with Order, perhaps from the Order Realm or Zereth Ordus, perhaps even a titan
- the nathrezim after continuing to develop Legion technology
- a group of goblins or mechagnomes going wild after discovering/inventing incredibly powerful technology
- the Light, with naaru technology
- rogue First One creations who are threatened by Elune
- the "seventh force"
- aliens from the Great Dark Beyond with advanced technology which uses all of the forces/elements (perhaps the seventh force themselves)
- brokers combining First Ones and goblin technology to gain full control over the flow of anima
And way more that would be a lot more of a stretch, like Azshara going after Elune out of spite for the night elves. My current vision would be that Gallywix traded some of the Black Blood and goblin technology to the brokers, who return with a Gigeresque synthesis of Black Blood, goblin tech, and First Ones tech to create a substance that converts living things into machines which they use to launch an attack on the Realm of Life.
Current lore has Spirit and Decay responsible for creating anima and binding a living thing to the Shadowlands, and older lore has that be the result of the Curse of Flesh. So there seems to be some intimate connection between Spirit/Decay and the Curse of Flesh, so a connection to the Black Blood seems natural and is a way to continue the involvement of the Old Gods after they're otherwise completely done with (and I really want more of the flesh stuff that's been mostly eclipsed by the Void).