Stuck on a Crossword? Find the Secret Underworld Boundary!

Sure, I’d be happy to help! In mythology and religion, the underworld is often depicted as a dark and shadowy place that is home to the dead. In Greek mythology specifically, the river Styx is considered the boundary between the world of the living and the underworld.

The river Styx is said to flow through the lower realm of Hades, and its murky waters were believed to possess special powers. In fact, it was said that those who drank from the river or were dipped into it would gain invincibility. The most famous story involving the Styx is probably that of the hero Achilles, who was dipped into the river by his mother in order to make him invulnerable–except for the spot on his heel where she held him, which would later prove to be his downfall.

In addition to its role as a boundary between the worlds, the Styx also had a more practical purpose in the underworld–it was the river that the ferryman Charon would guide the souls of the dead across to reach their final destination. In this way, the Styx is not only a physical boundary, but a symbolic one as well–it represents the journey from life to death, and the transition from one state of being to another.

So to sum up, the answer to the crossword clue ‘Underworld boundary’ is STYX, which refers to the river in Greek mythology that separates the world of the living from the realm of the dead. It’s an important symbol of transition and transformation, and has been featured in many famous myths and stories over the centuries.