The Trench of Antipathy was one of the most dangerous parts of the Planesworld.
Noted Dark Dependent scholars, historians, and folk-keepers talk about how this was one of the deepest parts of the Planesworld. It was said that it had a powerful gravity force. The dark energy water was so potent it would 'choke' people and make them unable to breathe. Even creatures that don't breathe in oxygen would sense a strange choking feeling as it triggered the death energy that stopped life. Even those of the Grendelor race would fear moving down the dark trench.
Martha, Puff, and Lea had arrived and were swimming over the sea. The attendants opposed exploring the region since even Crowns could die. But Lea refused to listen.