Source: The End of Eternity, pg(s). 83
Vannashiai is a resourceful miengu who watches over an underground oasis in Katapesh known as the Well Under the Blue Star by the few that know of its existence. The Well Under the Blue Star was not always an underground oasis, Vannashiai once guarded the oasis when it was above ground and known by a different name but then came the Drinkers of Tears, a pair of powerful shirs. Vannashiai could not hope to overcome the twin Divs and could not stop them despoiling her oasis so she decide to break open the earth which dropped the oasis into the cavern below. Now Vannashiai protects an beautiful underground oasis that is safe from the shir and unknown to most passing travellers.