Lethe is the Underworld river of oblivion/forgetfulness.
Styx is the Underworld river of hate, upon which the gods and goddess swear oaths upon.
they are both goddesses and are in the underworld
The Styx is one. It could make mortals immortal. Sorry, don't know any others. Styx, Acheron, Cocytus, Phlegethon and Lethe are the five rivers of the underworld.
the river Lethe and the river Styx. if there are more then I don't know them
Lethe isn't a word used alone; in Greek Myth it is a name for the Underworld river goddess of forgetfulness/oblivion.
I believe it's the river Lethe, but I'm not 100%
Styx?
There are five rivers: Styx, Lethe, Acheron, Cocytus, and Phlegethon. They symbolized hate, oblivion, sorrow, lamentation, and fire respectively.
There are Five rivers according to Greek Mythology: Acheron (woe), Cocytus (wailing), Phlegethon (fire), Lethe (forgetfulness), Styx (across with which spirits of the dead were ferried also the river of dreams lost because of death)
One of the four rivers of the Underworld was named Lethe, which means oblivion.
It is called Lethe.
No: Percy Jackson does not exist in Greek Myth- he is the creation of Rick Riodan.
The river Lethe was associated with Lethe a goddess of forgetfulness. Making her a daughter of Eris or Oceanus.