Halls of Irdorath
Off the coast of Khorinis, a mountain rises from the sea. At the waterline, a narrow passage cuts into the rock, wide enough for a single ship. Nothing about it suggests what is inside. Two of Beliar's four summoning temples were destroyed in the crusades forty years ago, the northern and the western. The remaining two vanished from every record and map. Irdorath was the eastern one.
Xardas pieced it together from old texts when Beliar's servants began converging on Khorinis. He recognized it for what it was and said nothing. The barrier around the Valley of Mines was not built purely to protect the magical ore. He needed time, and the barrier bought him decades.
The Halls inside are not abandoned. Seekers fill the corridors. Shadow Lord Archol commands the entrance. Behind a sealed door, opened only with the right words and the Eye of Innos, the undead dragon holds its lair in the deepest chamber.
This is not one of the four dragons from the Valley of Mines. When the Sleeper was banished, his power and soul were drawn into the bones of a dead dragon here. Where a living dragon has a heart, this one has a soul stone, the only thing binding a thinking will to a dead body. It is Beliar's avatar in the world, and it has been waiting patiently since before the hero ever arrived in Khorinis.
Defeating it requires the highest rank within its earthly order, five companions willing to die, and a weapon blessed by Innos or forged for this specific purpose. The entire journey through Gothic 2 was preparation for this room.