For forty miles between The Edge and the sea is the tangled damp of the Elrath. Stretching along the eastern coast the swamp is home to many humanoids and monsters. It is dark and very difficult to traverse, but many isolated groups of elves, gnomes , lizardfolk live throughout the swamp. There a very few known paths through the swamp, and with the Edge the only destination beyond, few have reason to make new ones. There are a few charted navigable channels between the sea and Zamtarvi; the largest and safest of which is the Little Vodospa, which empties into the ocean near the island city of Kerito. There are several wood elf villages along this thoroughfare, which serve as way points for sailors and trade posts for herbs and druidic concoctions. There are also some lizardfolk and elven towns along the coast, similarly serving the sailors of the great east sea trade routes.
But the swamp grows more dangerous year by year. The druids long ago gave up trying to tend to the fetid wetland, choosing instead to protect a small area around each village, and the lizardfolk, bullywigs and worse continue to expand their territory. In the last hundred years, the lizardfolk and bullywigs have grown so bold to attack ships on the Little Vodospa forcing merchants to hire more and more mercenaries. The lizardfolk, can sometimes be bought off for safe passage, but the savage bullywigs are not so easily dissuaded. Zamtar Teva turned to the tower wizards for a solution, and they produced the king airship, which was to fly the most precious cargo over the swamp; this is dearly needed as Zamtarvi’s economy is shuddering under the ever increasing cost of mercenaries.
Back to the swamp, their are tales of the dark influence of the corrupting influence of Umberlee. Tales of vicious monsters or the plants themselves coming to life to attack those lost in the swamp are common, and keep most civilised humanoids from venturing below the Edge. More interesting are the tales the traveling wizards tell, that Umberlee has corrupted the Weave itself, drowning righteous fire and making the lightning of her storms all the more powerful. How much faith you put in the stories of the few wizards crazy enough to venture into the swamp is your choice.