Celestian

Celestian the Far Wanderer was an enigmatic deity from the world of Oerth revered by planewalkers and wildspace wanderers. He was one of the major powers worshiped on the Rock of Bral. He was also called the Star Wanderer. 
Celestian had access to many of the spells used by powerful mortal wizards, including any spells related to travel or movement. In addition, he was known for seven unique spell-like powers: creation of a sheet of shifting lights similar in appearance to an aurora polaris that could damage foes; summoning of a comet; manifestation of heat lightning; calling of a meteor storm; infliction of a chill as cold as space; emanation of a beam of white light as bright as a star from his eyes; and creation of the sound of deafening thunder. He could only manifest these powers if not underground or indoors.
Celestian's holy symbol was a black circle with seven stars which glowed in different colors like tiny suns. The seven "stars" were seven gems: amethyst, diamond, emerald, jacinth, ruby, sapphire, and topaz. The Church of Celestian was divided into seven orders. Priests of each order wore different colored robes, and each wore the holy symbol with a gem of different color in the center of the others. They wore black cloaks over their robes covered in gems to mimic the starry sky.