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For as long as mortals have walked the world, a dark shadow has loomed over the Yatil Mountains. Here the Witch Queen Iggwilv penned the Demonomicon and reigned over an empire so terrible and so wicked that the lands around were forever changed. Yet hers is not the worst legacy of those who have claimed these peaks as their home. A temple to the dark god—the Chained God, He of Eternal Darkness—has stood somewhere in these mountains since before humans founded their first kingdom. Its influence has long lured the insane, the cruel, and the vile to its shadowy corridors.
Many times in its history the temple has risen in power, and many times it has fallen. The last time, courageous heroes sacked it, bringing down its blasphemous altars and putting the twisted monsters lurking there to the sword and spell. As thorough as their work was, however, it was not enough, for a new cult has uncovered the ruins and is freeing the Chained God from his prison.
The cultists located the dread Wailer of Tharizdun, the instrument designed to open the Way to Darkness. They have sounded this horn, made sacrifices, and stand ready to greet their master… unless the heroes can stop them first.
In this 10th-level challenge, mad cultists have located the Forgotten Temple of Tharizdun and sounded the dark god’s iron horn, the Wailer of Tharizdun. Now the ground trembles as the Chained God’s aspect struggles to escape.