Harvester's Deep

Harvester's Deep is a picturesque lake located in the First World, near the Thrice-Tenth Kingdom. Despite this proximity to the realm of Baba Yaga, its true danger is the Harvester, a terrifying monster that sleeps in its depths and wakes up every 20 years. The nearby towns, which gleam with the shells of colossal shrimps and nautiluses, are kept fed by otter-riding druids and cavaliers, and spend the several years prior to the Harvester's awakening evacuating or preparing shelters to wait out the rampage.