Baar Dau is a meteor that hovers above Vivec City in The Elder Scrolls Online: Morrowind. The rock is held in place by the divine energy of demigod Vivec, and serves to test the local citizens' faith to Vivec. The exact source of the meteor is unknown, with the most popularized belief being that the Daedric Prince Sheogorath hurled the rock at Nirn from the Void.
Vivec's divine energy has diminished, and Baar Dau has dropped dangerously close to Vivec City. The Vestige must retrieve a Blessing Stone for Vivec, in order to restore enough power to hold up the moonlet.