Cangxuan Saint Stamp is the world stamp Cangxuan Stamp.
When the Blue Profound Heaven was born, an object was born from the most ancient source energy, which is known as the Blue Profound Saint Stamp.
The one who owns the stamp will be the ruler of Cangxuan Heaven - Heaven Master. The ruler would have tremendous power and blessing of the Cangxuan Heaven.
The Saint Cang Xuan was the first Cang Xuan's Heaven Master later inherited by Zhou Yuan.