Vast Swamp

The Vast Swamp was an area of swampland in interior Faerûn that lay between Cormyr to its west and Sembia to its east. It was widely thought of as the most dangerous stretch of wilderness in the land. Ignored by surrounding nations, it had no proper name; "vast swamp" appears to be a nickname that stuck.

Geography
It was flanked to the north and east by the Thunder Peaks mountains, to the west by the Eastern Plains of Cormyr, and to the south by the Dragonmere, a body of water that poured into the Sea of Fallen Stars. Between the swamp and the coast ran the Way of the Manticore, the only overland route between Cormyr and Sembia.

The Vast Swamp was largely marshland covered with forest of middling density, making it appear more like a flooded forest than an actual swamp. One could rarely see far for the forest. The terrain was dominated by undergrowth and bogs with precious little clear, dry land to be found anywhere within its borders. The ground underfoot was soft and spongy, largely comprising thick peat. What paths there were to be found winding through the swamp were little more than muddy trails.

The many deadly natural hazards of the swamp included insects that transmitted diseases, noxious clouds of gases, dense fogs that were utterly impenetrable, patches of quicksand and bogs that would suck the unwary down to their doom, and the freezing rain that fell thereabouts.

The borders of the swamp were forever expanding towards the Way of the Manticore, slowly but inexorably. When it finally reached the road, it might halt all overland travel between Sembia and Cormyr.

Climate
Whether in the depths of winter or the height of summer, the marsh and forest were forever shrouded with a murky fog. Even in bright sun, the entire swamp was coated with a thin and persistent mist, making it hard to see more than a mile (1.6 kilometers) in any direction, even if one could see over or past the trees. Even fog from the Dragonmere coast constantly rolled inland towards the swamp.

Geographical features
The Vast Swamp was the source of the Darkflow, a river that flowed from the center of the marsh and south into the Lake of Dragons. As the name suggested, the water was so dark that it was described as "inky". The river also formed part of the border between Cormyr and Sembia.

Flora
Around the fringes of the swamp grew blueleafs and oak, typically gnarled and stunted. As one ventured further in, copses of more tangled trees grew more common and finally became predominant. A variety of trees grew in the heart of the flooded forest: black gum, cypress, water ash, water birch, and willow and weeping willow. These invariably choked the region and were draped in moss. Meanwhile, duckweed floated on the waters.

Politics
The Vast Swamp and the Darkflow served as the de facto border between the realms of Cormyr and Sembia, largely because neither Cormyr nor Sembia had any interest in laying claim to the land, nor anything beyond. The myriad of monsters and other hazards made the Vast Swamp the most dangerous place in either land, people had no cause or desire to go in, and clearing it and draining it would be an epic undertaking, so both nations were happy to ignore it—at least until some raider or monster crept out and into their lands.

Thankfully, the savage denizens of the Vast Swamp usually stayed in its confines, content to war between themselves rather than raid the neighboring lands. Nevertheless, lizardmen dwelling in the Vast Swamp sometimes ventured down the Darkflow to raid villages. The village of Battlerise, which stood on the west bank of the Darkflow River, was once beset by lizardmen from the river and monsters emerging from the Vast Swamp. Long before the 1360s DR, its population had plummeted. The lizardmen also raided the monastic settlement of Monksblade further up the Way of the Manticore, contributing to its depopulation over centuries. By the 1360s DR, Ghars also lay within reach of Vast Swamp raiders, but was well defended. The town of Thunderstone was also well protected against the dangers of the swamp.

Nevertheless, the Vast Swamp enticed explorers who would brave the dangers and endure the difficult environment. However, neither Cormyr nor Sembia themselves had attempted any major expeditions into the Vast Swamp before the late 14th century DR. Hence few people knew for sure what lurked in the darkest, dankest depths of the swamp.

History
In the Year of the Thirsty Sword, 900 DR, King Galaghard III's army, the Glory of Cormyr, drove the Witch Lords and their undead forces toward the Vast Swamp. They caught and trapped them there against the swamp's western shore and finally defeated them.

In the Year of the Dragon, 1352 DR, the Lost King Gondegal, who attempted to carve his own kingdom out of Cormyr, extended his reach as far east as the Vast Swamp.

In the late 1340s DR, the Thunderstone farmer Del Geery (whose farmland extended to the edge of the Vast Swamp) sponsored the explorer Hadley Erridge for a thirty-man expedition into the Vast Swamp to capture a live hydra. Two months later, they returned with an adult hydra in a cage of iron. Ultimately, Geery developed a variety of uses for hydra body parts and began to fund new hydra-hunting expeditions into the Vast Swamp. He was very successful at this new trade by 1367 DR.

In the late 1360s DR, the Dragonslayer lizardfolk tribe (so named for claiming to have killed several dragons over the decades) slew the black dragon Tyra and moved into her lair. However, Tyra's brother Despayr came and massacred many of the Dragonslayers, and enslaved the survivors. He then took her lair and hoard as his own. He had a daughter by one of the lizardfolk, Ketsarra Shadowscale, who became their new chieftain. In time, Despayr was visited by Esvele Graycastle, who retrieved from the treasure the shadow shard, with which Despayr transformed the lizardfolk slaves and even his daughter into the first of the undead Shadowscales. The Dragonslayers were no more.

In the service of Esvele's scheme, Despayr sought to dominate much of the Vast Swamp. Their goal was to tear a hole in the Weave of magic and so form a dead-magic zone over all the Vast Swamp. It was to be a powerbase for the followers of Shar and an earthly homeland for their shadar-kai allies. In the Year of Lightning Storms, 1374 DR, at Despayr's behest, the Shadowscales made savage war upon the tribes of the Vast Swamp, particularly the other lizardfolk, who could hardly resist the shadowslain raiders. Many were slain and more were captured and carried off to the Lost Refuge, eventually returning as Shadowscales themselves to attack their own kin. However, the lowly Kessessek proved himself by turning the Shadowscales and the leaderless Sharptooths acclaimed him as their new chieftain. Kessessek adopted an aggressive but canny strategy against the mightier Shadowscales. He made an alliance between the Sharptooths and the Blackscales and Poison Dusks—other tribes attacked by the Shadowscales—and so they survived against further raids. Then, in early Eleint, he led a war party of Sharptooths, Blackscales, and Poison Dusks into Shadowscale territory around the Skull Staff. They hoped to slay some Shadowscales or their Shar-worshiping allies, or else capture some of the "dream walkers"—mind-controlled petitioners of a false Temple of Mystra—that regularly passed that way to the Lost Refuge. Kessessek and his kin recognized that these dream walkers were innocents and hoped to capture them, free their minds, and deny this resource to their shared enemy.

In fact, the next group to pass that way were adventurers in service to Mystra investigating the false temple and Sharrans' activities. Parlaying at the Sharptooth encampment, Kessessek aided and enlisted the adventurers to deal with the Shadowscales at the Lost Refuge. Afterward, as the adventurers went into the Plane of Shadow to end the Shadowscale and Sharran threats, the Sharptooths took over and guarded the Lost Refuge. When they returned, the Sharptooths feted them as heroes. In the following weeks, after War Wizards investigated the Lost Refuge, the kingdom of Cormyr made an alliance with the Sharptooth tribe. Limited trade even began between lizardfolk and human, and the Vast Swamp lost a little of its mystery and dread to the Cormyreans, though they still declined to go near it.

The Skull Staff
Just within the swamp on its south-western border was the Skull Staff, a 30-feet-high (9 meter) log jutting out of the ground, surrounded by many kinds skulls, with more mounted on spikes and stakes. Built by orcs, it was a territorial marker for them and other tribes who held the area.

The Lost Refuge
The Lost Refuge was a Cormyrean keep placed near the border of the Vast Swamp. It supported a town as well but nearly a hundred years ago the combination of the expanding swamp and an orc attack killed the garrison and Cormyreans subsequently forgot all about the place. It was shortly thereafter conquered by hobgoblins but more recently fell into the hands of Sharran cultists. Legend has it that the Dusk Lord of Sessrendale opened up a planar rift to the Plane of Shadow in this keep after fleeing from his former homeland.

Orvaskyte Keep
Sages agreed that Orvaskyte Keep, discovered in the 1360s DR by adventurers seeking missing comrades in the swamp, was built by members of the kingdom of Orva. The keep was believed to have been built around the 7th century before Dalereckoning, but was reported to be (in 1374 DR) occupied by fiends and other monsters, which abruptly ended all considerations of exploring the place further.

Elven ruins
Many years before 1374 DR, an adventuring group called Moon's Twelve went into the Vast Swamp looking to find their fortune. The last surviving member, Sylara, returned to civilized lands ranting and delirious about an elven ruin as extensive as Myth Drannor but her group was run off by mind flayers and beholders. She died of a swamp fever before she could elaborate further and no one knew if what she saw actually existed.

Other locales
Around 1374 DR, there was a frequently erupting boiling water geyser located in the western Vast Swamp. It was surrounded by several hot springs, and the area was misty, muggy, and smelled of sulfur. Lizardfolk sometimes camped here.

Inhabitants
The Vast Swamp was known to be heavily populated by tribes of lizardfolk, hobgoblins and other goblinoids, orcs, gnolls, and trolls. There were also reports of catoblepas, a few black dragons (mostly small), one or two insane beholders,  occasionally hydras, and even grell, as well as stories of even stranger monsters. Only the common breed of hydra was known in the Vast Swamp, but they were well-feared by the humanoid inhabitants, owing to many deadly encounters.

Will-o'-wisps were also found there, and were often sighted from the Way of the Manticore.

Meazels were widespread in the Vast Swamp. They regularly preyed upon kobolds and goblins they could catch alone.

Darktentacles were among the rarest yet deadliest predators of the Vast Swamp. They lurked beneath the water's surface and surprised and seized victims with their tentacles. When one became known to swamp denizens, they carefully avoided it. A darktentacles could eradicate all fish and birdlife in an area in weeks before it moved to fresh hunting grounds. Despite their rarity, however, their populations were apparently growing in both the Vast Swamp and the Marshes of Tun since the Time of Troubles of 1358 DR.

Lizardfolk
According to Brother Twick, a knowledgeable cleric of Chauntea who studied the marshes of Cormyr before 1367 DR, the lizardfolk of the Vast Swamp were utterly savage, even compared to those in the Marshes of Tun, and matched all the worst depictions of lizardfolk. The evil atmosphere seemed to have affected these lizardfolk badly; they were said to be almost psychotic, attacking any outsider who even came close and relentlessly and obsessively hunting down humans, elves, and halflings. Rather than follow the traditional lizardfolk god Semuanya, they paid homage to evil spirits of nature and to fiends, especially the demon lord Sess'innek. Shamans of these lizardfolk supposedly fashioned strange altars and icons from the bones of animals and sacrificial victims, and there conducted brutal rites. He reported these lizardfolk gathered into tribal groups of only around a dozen members and that they were nomadic, erecting no permanent structures or shelters. They were apparently led by especially cruel and wicked lizard kings who demanded the sacrifice of sentient beings like elves and humans, and would settle for killing and devouring their own followers.

The reality, however, was quite different when the adventurers in service to Mystra penetrated the Vast Swamp in 1374 DR and gained the aid of the friendly and traditional Sharptooth tribe and their allies, the Blackscales and Poison Dusks. Only the undead Shadowscales, twisted to suit a dragon's ends, were hostile. Ultimately, the Sharptooths even made an alliance and trade with the kingdom of Cormyr.

Some of the known lizardfolk tribes are:
 * Sharptooth
 * Shadowscale
 * Blackscale
 * Dragonslayer
 * Poison Dusk

Rumors and legends
According to one legend, the notorious Dusk Lord of Sessrendale was not killed as history recorded, but instead escaped into the Vast Swamp. There, the story said, he plotted vengeance against all living beings in the Dalelands. The Dusk Lord was the most well known of the villains said to inhabit this land.

There were rumors of mind flayers, beholders, and lichs lurking in an ancient ruin close to the center of the marsh. Necromancers were also reputed to make their homes in the Vast Swamp. Evil magic was said to lay about the swamp, and the dead were restless.