The Nether Sea is connected to the vast network of tunnels and caverns that makes up the world’s Underdark. Sometimes creatures from the Underdark will stumble into the realm of the Nether Sea, but without a powerful ship like the Ultros, they are unable to make it very far before succumbing to the chaos of its primordial waters.

Traveling to the Nether Sea. There are two ways to get to the Nether Sea. Neither of these methods are well known, even among the gods. They must be discovered through research or by seeking out extremely wise creatures, such as sphinxes.

The Dead Falls#

The River Lethe empties into a huge rift called The Dead Falls, which descends all the way to the Nether Sea. This method is extremely dangerous, as the mile-long drop is enough to kill most creatures and shatter most ships. Estor Arkelander’s ghost is aware of this method, but he refuses to share it with the party unless they have agreed to his bargain.

Charybdis, The Ravening Maw#

The great whirlpool known as Charybdis in the Forgotten Sea can transport a ship to the Nether Sea. Very few ships have ever returned from this journey. This is because the dark waters of the Nether Sea quickly eat away the wooden hulls of most ships.