Greek Demigods and Spirits » Styx
Styx, the Sacred River of the Oaths
Styx and her children Zelus(ambition), Nike(victory), Cratos(strength) and Bia(violence) had played a very important role during the battle with the Titans and was therefore specially honored by Zeus to personify the sacred river of the gods.
The river of Styx separated the world of the living from the world of the dead. In the waters of the river of Styx the Olympian Gods were giving oaths; should they happen to break an oath, they had to experience a severe penalty: they were forced to drink from the river and had to suffer one year without ambrosia and nectar, the food of the gods; after that time, it was prohibited to the oath-breaker for further nine years to attend the meetings of the other deities.