Ritual of Oblivion

When Kathax first attempted to ascend to godhood, the forces of the world allied against him and his followers. Dragons, unicorns, mages, kingdoms, and servants of all the gods banded together to undertake a ritual which would create a ring of light around the plane of Yntheria. The moment Kathax's soul left the plane to ascend to godhood, it would pass through the ring and be destroyed, ending his ambitions and the threat they posed to the world forever.

The Betrayal
Alas, this was not to be, for Kathax had swayed members of the coalition to betray their own in exchange for great power once Yntheria fell under his dominion. The kingdom of Gideon turned against them, and his court mage Elizabeth sabotaged the ritual from the tower of Il'Dath. Kathax ascended, and the unicorns under the leadership of Elder Tysius banded together to weave a spell which cut Yntheria off from the planar universe, knowing that if Kathax returned to Yntheria as a god, the plane would fall under his control for all eternity. Once the spell was completed, the unicorns dispersed, and the site where that spell was weaved become known as the City of Shadows. The spell barrier has kept planar beings from being able to leave Yntheria, and has cut off the gods from intervening with this world. But over time, the magic of the barrier has weakened, and Kathax's whispers have reached the minds of those who seek to realize his return to the world.

Completing the Ritual
The ritual of oblivion was interrupted, but thanks to the intervention of the unicorns, it can still be completed. Since Kathax stole his divinity from the gods of Yntheria, the relics of the gods are required to complete the ritual, and must be used at the sacred locations to make effective use of Yntherias ley-lines.

Locations
These are the locations so far which are known to be sites for the ritual of oblivion.

Tower of Il'Dath
In the swamp of Gideon.

City of Shadows
Somewhere in the Nethyrian desert.

Citadel of Karasch
In north-central Shay-Elliri.

The Dark Obelisk
Through the passage in the Mountains of the Black Claw in the county of Kalass in southern Shay-Elliri. The pass only appears at midnight after spending a night in the village of Ayan, Take the left pass at the fork to get to it. It is well defended by a ghoul cleric of Nazeth who guards the obelisk jealously. Those who have attempted to take it from her have joined her ranks as undead soldiers.