A name of caves yielding riches, treasure and danger, located in the fiefs of House Urbish; a trap for heroes who pillaged dungeons. Few people came back, and those insane, diseased or undead. Vaelan of the Sidari (4-5 generations ago) descended the Mouth of Ruin. He was given up for dead but 7 years later he returned well and rich. He did not reveal his secret, and repeated his journeys each time returning with more treasure. For not revealing the secret to tame the monsters, he was murdered by his own people.