Deep Depths of Blackmoth

The Hades Trench (tentative name)

As mentioned, the deep depths of Blackmoth are uninhabitable, and not even the strongest nor smartest deep sea predators or prey live in its darkness, as something repels most away. Those who do venture, be they man nor beast, have scarcely returned alive or sane, and have lost their hearing all together. No one has fully explored the Hades Trench, as it stretches for miles and dips down into the inky blackness that even shadow itself seems to be lighter by comparison. It is however, a crater, as discovered by radar and technology. The remains of an ancient volcano that was slammed by an 'asteroid' at one point, or so it is theorized. Oddly... something small and spherical sits at the exact center of this crater... what it is? No one knows, as no one has physically made it down that far.