River Styx
A river whose "waters" resemble more some unholy marriage of smoke and dark blood than anything else, the Styx is death in motion, flowing through the lower realms.
Geography
The River Styx flows through all the Lower Realms, with its headwaters in Pandemonium and its mouth in Acheron. However, this is a simplification, as the River frequently travels between realms by portal, and its flow does not follow the gravitational or other physical laws of ordinary rivers. In Baator, it flows thrugh a sharp canyon valley known as The Blood Rift.
Localized Phenomena
The River Styx is absolutely lethal, and has unique natural properties, including:
- Creatures who contact the river even briefly are wiped of their memory and sense of self.
- Memories lost to the Styx are not limited to the creature who touches it; they are also wiped from minds and objects across the multiverse
- Creatures who contact the river suffer a disability of mental faculty similar to the effects of the Feeblemind spell.
- Creatures age approximately 100 years for each minute of contact with the river.
Fauna & Flora
The Styx denies nearly all life forms, but one. The Xerfilstyx is a form of fiend which has been observed to enter its waters recreationally, taking pleasure in its amnesia-inducing effects.