The Banner of Kaviyan was a flag created by Persian magi to ensure victory for its armies. Spells were cast while the blue silk banner was being woven and and again when the emblem of the sun and moon were embroidered with gold and silver threads. So long as an army displayed the banner, it could not be defeated. The army of the King of Kings Khusro, led by marshal Shahr Baraz succeeded in reconquering Palestine, Egypt and Asia Minor and dreamed of sacking Constantinople.