Styx

Styx is the name of the boundary river between the living world and the underworld, as well as its personification in Greek mythology.

During the 5th century BCE a waterfall in Arkadia's Golden Fields region was named the Waterfall of Styx after the river and the deity.

Trivia

 * According to the story, Achilles' famous invulnerability was the consequence of his mother dipping him into the waters of the river Styx in his childhood.

Appearance

 * Assassin's Creed: Revelations – The Lost Archive
 * Assassin's Creed: Unity
 * Assassin's Creed: Odyssey