However, when Abeir returned to Toril over a century ago, those tunnels were replaced by the ones found below the dragonborn city of Zolgotha. Weirdly, when Abeir and Toril were finally freed of each other during the Sundering, the Zolgothan tunnels did not return..
Today, those catacombs below Phlan are known as Leviathan by those who use the network of tunnels just below the city's streets. Rumors insist that only the truly foolish would brave those darkened passages of peril and pain. Leviathan is filled with monstrous creatures and wicked defenses that have protected most of it's secrets for over a century.
However, in the last year, the catacombs has been invaded by the Cult of the Dragon, hoping to find treasure and weapons in their newfound goal of freeing the Mother of Dragons, Tiamat.
There are even rumors that the Harpers have have lost agents in the bowels of Leviathan, in their mysterious duties.
The monstrosity that resides below Phlan is a lasting and deadly menace, and a reminder to the misfortunes of magic gone awry.