Isishaa

A god mentioned in the description of the Staff of the Nomads:

A sturdy wooden staff, worn smooth. It is inscribed, "I found this branch scoured clean by the winds in the High Desert of my birth; a gift rendered unto me by Isishaa, a god of the devouring sands. In eternal debt to his forbearance, I wield this weapon. When he calls, my bones shall fall into his dry embrace as this tree once did."