Everblight is a godlike entity of malevolent intent from the Hordes table-top game, although never seen in game he is the driving force of the Legion of Everblight and is the primary source of their power: much like the Chaos Gods of Warhammer lore he influences the mortal world via horrific mutation and is akin to both a superorganism and a virus, infecting other beings while linking them to his own psyche so as to create an army of beings not only loyal to his will but also linked to his very thoughts.

Much of Everblight's origin is explained in the Legion of Everblight article and although every single member of the Legion of Everblight can be considered a part of Everblight the one who is currently considered the monster's avatar is Thagrosh the Messiah.