The liberation of Eshrod
Black Star, Visica, the lost eye of Gruumsh are some of the names of the astronomical body whose appearance in the sky would signal the beginning of the time of chaos. The star is actually a portal to the deepest most chaotic parts of the shadowfell. Visit has two faces the first being the open side of the portal which looks directly onto the hellish horrors of twisting chaos that no mortal mind can comprehend. The other face is closed to the chaos and appears as a smooth black half sphere. The first and last day of each cycle of the centaur calendar are tied to this rotation indicating the time when the chaotic side is most directly facing Eshrod.