These Avatars have been around for years and have finally been finished.

An Avatar is the term normally applied to the physical form that the spirit of an Aeldari god has managed to possess and animate in corporeal or real space.

An Avatar is the physical body possessed by a fragment of the spirit of the Aeldari god of war and strife Kaela Mensha Khaine, though the term can actually apply to any divine entity of the Warp that has found some way to take on a corporeal form on the mortal plane of existence.

“Once a year, one of the Exarchs of a Craftworld is chosen by its Farseers to hold the title of Young King. When a Craftworld prepares for a major war, its Exarchs begin to feel the Avatar’s call. The Exarchs go to the door leading into the Avatar’s chamber. There they begin the ancient ritual to rouse the Avatar, where they anoint the Young King and sing battle hymns. Then the chamber’s door opens, and the Young King enters. The Exarchs continue the ritual at the entrance. It may take hours or days, but finally a terrible scream echoes from the chamber and the Avatar rises. There is no sign of the Young King – it is unknown whether the Young King is united with Khaine or is destroyed.” (40K Lexicanum)