While searching our database we found 1 possible solution for the: River in Hades in Greek mythology that caused forgetfulness in those who drank its waters crossword clue. This crossword clue was last seen on 30 November 2021 The The Mirror Quiz Crossword puzzle. The solution we have for River in Hades in Greek mythology that caused forgetfulness in those who drank its waters has a total of 5 letters.