Saga of the Serpent's Skull
The fabled city of Saventh-Yhi is one of the most sought-after lost cities on Golarion. It is said to be the westernmost outpost of the fallen Empire of Azlant, located somewhere in the Mwangi Expanse, and built sometime during the Empire’s peak as a sole attempt to colonize northern Garund and exploit its natural riches.
Its ruins are rumored to house lost treasures of the ancient Azlanti, including devices and magics since lost to the mists of time; that its streets are paved in gold and its buildings gilded in silver to become a brilliant reflection of the sun; that it is shrouded by powerful magics and long-lasting rituals; and that is is merely a legend which never physically existed.
According to the notes the party has uncovered, the city is located somewhere in the Mwangi Jungle no more than a month’s ride from the ruins of Taizon, an outpost in the southernmost Mwangi. Yarzoth has much speculation that it was the location where her dark god, Yig, Father of Serpents, was beheaded by a nameless Azlanti hero, the act which caused the cataclysmic recession of the vast Serpentfolk empire. Her notes also mention that Taizon is linked to Saventh-Yhi through something called “the pillars of light.”