The Preservation — Qlipoth

"The philosopher gazes upon the stars trying to find the ultimate goal of civilization — 'Build a wall.' A majestic voice echoed in his head. 'Build a wall.'"
— Fables About the Stars by Adrian Spencer Smith

The builder of the Celestial Comet Wall, the Subspace Crystalline Barrier, and the Great Attractor Base. Followers call them the "Amber Lord," one of the oldest and most tenacious Aeons, having survived the "Dusk Wars."
After finding out a threat was imminent, the Amber Lord forged a powerful light-years-long seal that would isolate and protect the living worlds.