Mycaisa is an abandoned Dimernesti Elf village that is west of Habbakuk's Necklace. In the Age of Mortals, it was at the edge of the World Gash.
Post Cataclysm
Mycaisa was abandoned after the Cataclysm and the Dimernesti started living a more nomadic life. Since it remained somewhat intact it was used as a stopping place by Dimernesti and Dargonesti Elf travelers.
Post War of Souls
The waters around the village became odd. This was caused by the formation of the World Gash, whose edge was right next to the abandoned village.
References
- The Search for Power, "Marine Skies" p. 233, 239, 241