Hollow's Heart

Fraz-Urb'luu, Prince of Deception, was among the first tanar'ri lords to dominate a layer of the Abyss in the fading days of the obyrith dominion. The demon's terrible magic staff allowed him to command immense armies of demons and other hateful creatures and served as the key of his absolute mastery over Hollow's Heart. At the height of his power, Fraz-Urb'luu could raise mountain ranges in a matter of seconds or drain bottomless seas with but a thought. Such godlike power bred incredible arrogance, and soon mighty Fraz-Urb'luu mastered the art of summoning his fellow demon princes to his own court, where he humiliated them before a chattering audience of sycophants.

Instead of assailing him in the impregnable fortress of Hollow's Heart, Fraz-Urb'luu's rivals indirectly aided one of the demon's enemies, the archmage Zagig Yragerne. Using a demon-provided artifact called the Ichor Lance, Zagig bested the Prince of Deception in battle on the Material Plane, binding him to a bas-relief in the dungeons of Castle Greyhawk for more than 200 years.

On the Abyss, Fraz-Urb'luu's demonic rivals squabbled over his layer, managing only to destabilize and ruin it. Upon returning after his eventual escape, the Prince of Deception found his beloved layer barren and lifeless, an endless expanse of fine white powder under a starless black sky. Here and there squatter demons had managed to craft islands in their own image, but most of them couldn't stand up to his brutal attacks and abandoned the layer shortly after his return. Elsewhere in the plane, however, powerful beings like Demogorgon and Graz'zt remember their former "audiences" with the prince and have begun to make retributive forays into his ill-protected reclaimed holdings.

The reformed Hollow's Heart is as large as a continent on a Material Plane world, but it is merely a sliver of the territory once commanded by the Prince of Deception, and every inch of regained ground reminds Fraz-Urb'luu how much he has lost at the hands of his hated human enemies.

Chaotic evil rakshasas known as the Hollow Rajahs command several of the demon lord's key settlements and citadels. These ruthless, capricious creatures serve as the de facto government of the layer, while Fraz-Urb'luu himself focuses upon rebuilding his domain and affairs in the capital city of Zoragmelok. Despite the lack of heavenly bodies, the ground of Hollow's Heart is illuminated as if under a noonday sun.