They stand in front of it and that’s it. Void elemental boss would make more sense than bunch of random nagas and sea monsters in context of old god. Atleast as summons of some bosses or something. Design is too cool to just not use it at all
They are actually chronomatic, since it’s boss in nighthold with this model. But i’m not sure if Azshara even know anything about time magic. I guess just re-use cause they look cool
The Arcane Elementals resemble Void Revenants. The interesting thing about the Void Revenants is that they are heavily implied to be Ethereum as shown by the transformation of Nexus Prince Bilaal.
Ethereum before becoming Void were beings of the Arcane so it is no surprise that Void Revenants look like partly fleshy versions of the Abyss Elementals and Chronomatic Anomaly to the point where they have the same mouths.
Void on it’s own looks like Faceless Ones(which has Tentacle Face), Sha(bestial mouth) and Old Gods(mouths are everywhere)… Arcane Elementals and Void Revenants have monstrous yet Orderly mouths.
As for the supposed Light the Manafiend Models use let’s look at the Light Elemental shall we?: