User blog comment:B214/Shin DxD 1 discussion/@comment-73.57.25.92-20180825203644

Does anyone else think that when rias said that Ingvild may be able to contorl the waters of the underworld in the future, she may have meant the magical waters of the underworld, as in the five magic rivers seen in greek mythology(https://en.wikipedia.org/wiki/Greek_underworld#Rivers)?

-The Styx river(generally considered to be one of the most prominent and central rivers of the Underworld and is also the most widely known out of all the rivers. It's known as the river of hatred and is named after the goddess Styx. This river circles the underworld seven times; often seen a river of tar(http://dantesinferno.wikia.com/wiki/Styx))

The Acheron river (the river of pain. It's the one that Charon, also known as the Ferryman, rows the dead over according to many mythological accounts, though sometimes it is the river Styx or both; can be a river of fire, since we are talking about pain.)

The Lethe is the river of forgetfulness. It is associated with the goddess Lethe, the goddess of forgetfulness and oblivion. In later accounts, a poplar branch dripping with water of the Lethe became the symbol of Hypnos, the god of sleep.)

The Phlegethon (the river of fire. According to Plato, this river leads to the depths of Tartarus; also seen as a river of blood(http://dantesinferno.wikia.com/wiki/Phlegethon))

The Cocytus (the river of wailing; also seen as a lake of ice(http://dantesinferno.wikia.com/wiki/Lake_Cocytus))

In some legends, Oceanus is a river of the underworld, and it's the river that encircles the world, and it marks the east edge of the underworld, as Erebos is west of the mortal world.

What do you guys think?