Etherian Grey Men

"The Etherian Grey Men turned out that they're responsible for the destruction of Hathoria's very own Brilyante ng Apoy, or the fire Gem if you don't understand Tagalog like me (well, mostly). They're just a bunch of Etherian supremacists who wanted to avenge the late Hagorn, and you see, they're like the Belkan Grey Men too, right?"

--Su Ji-Hoon, How I Can Help Make the World Great (chapter)

The Etherian Grey Men was a faction of hard-line Etherian supremacists that arose sometime in Encantadia. The group was responsible for made Hathoria's Fire Gem being destroyed.

And also they are new antagonistic force after Belkan Grey Men are the one who founded them as new faction to frame enemies in Encantadia.