Subterranean tunnels of the Labenda Swamp

The Subterranean Tunnels of The Labenda Swamp is a network of underwater passage with occasional air pockets that are used by the Merrow in the Labenda Swamp.

Safe House Entrance
Inside of the gentleman’s safe house is a hole leading to the tunnels. The hole has chunks of rock, dirt, an interwoven network of roots coming down from the tree and swamp water running down the tunnel. It is about three feet wide in most places and there are claw marks where it has been dug out.

First chamber
This chamber is kidney shaped. It has a ten-foot high ceiling and natural gravel and sand floor. There are a few outcropping walls and in the center is a small pool. The pool has brackish and thick water with four discarded humanoid skeletons at the bottom. On the other side of the kidney there is a ten square foot side pool that hides a tunnel that connects the first and the second chambers.

The Tunnel
The entrance of the tunnel is 5 by 10 feet and is used to travel between the chambers. The tunnel is 15 feet high with a layer of sediment on the bottom. The tunnel curves below before evening out and going for about 30-40 feet before opening up into a 20-foot pool in the second chamber.

Second Chamber
This chamber is mostly built out of natural rock that has edges of stacked stones. The camber has elements that looked like it once was an old mason architecture. The walls seemed to have been partially reclaimed by the ages. Where stalactites and stalagmites met are two large central pillars that created a structure in the center. There is a big pool in the middle with a weird set of stairs that stepped up to a platform on the side, and a small pool in the north of the chamber where a underwater tunnel is located. There are no passageways visible in the room; all the entrances and exits are through the various pools of water. The Large Pool A large portion of the floor in the second chamber is submerged in water, different paths and avenues curves off and vanish and opens up to other tunnels beneath. The Platform On the platform is an oblong rock formation, boxes, crates, and piles of things gathered around it. The oblong rock formation is about six to ten feet wide at different places. It has a pool of water with mist rising and sifting from it, which is loosely drifting off from the surface of the water. There is enough space around the edges of rock for a lot of objects.

The Small Pool
Beside the small entrance pool there are small mounds of various minerals that has long dripped from the ceiling from condensation and various water flows that have come through this interior cavern and built a hard, rocky platform that emerged just outside of where the pool ends.

After finding the safehouse of the gentleman the Mighty Nine and Calianna went down the tunnel below, where the party found strange, twisted-looking merfolk (called "merrow") that seemed to have been living in this partially-submerged tunnel system, beneath the swamp. They engaged in battle, killed a number of them. When they sifted through the remnants, of what was dragged out of the safehouse, laying on the ground beside the pool. They found and looted:
 * A bunch of empty partially destroyed crates
 * Torn apart crocodile corpses
 * 250 gold worth of jewelry
 * 185 gold, 210 silver pieces, and 65 copper
 * Four sets of bloody manacles
 * Two vials with a thick oily purple substance
 * A number of broken vials
 * A well-crafted magical marble bowl of gold inlay with a curious design. The edges of the bowl shifted into five equidistant dragon heads, and each dragon has eyes of tiny gemstones. The gems are rubies, emeralds, sapphires, and diamonds. It is used as a communion device. When filled with enough blood and given the proper ritual, it is used to acquire auguries, divination, and communication across the Divine Gate with the Scaled Tyrant.

Here they discovered, that Cali's quarry was the bowl that could speak to the Scaled Tyrant (Tiamat). The bowl was sundered to pieces using Yasha’s Magician's Judge. Cali - with her quest complete, and not wishing to put herself in any further danger, decided to leave through the tunnel.

After Cali left Fjord made a brief swimming excursion into one of the far-off tunnels. Where he found that it led to the second chamber and seemingly a base of operations where more of these merrow lived and more remnants of what was taken from the safehouse.

On suggestion of Fjord the Mighty Nein all rest up before going down further into the caves. The group decided to follow Fjord through with Nott staying behind. On the other side of the tunnel, they engaged more merrows, and found a strange altar room where they had gathered everything they had stolen from the safe house. They slaughtered the Shallow Priest and his protectors. In this chamber they found:
 * Scattered bits of gold, silver, copper and fine silverware that are lost amongst the steps, some of them covered in dirt or mud
 * A cache of weapons that are bound in clusters with leather straps around them. Part of this cache are:
 * Four well-made longswords,
 * Four well-made short swords,
 * Two battle-axes
 * Two halberds
 * A locked, dark wood case, about four feet across and a foot wide, that is closed and latched,
 * When the latch is opened a blade fired out from where the lock is. Inside, there is a beautiful jewel-inlaid, curved pure gold colour blade called Summer's Dance. that seemed to bend with movement before flicking back into place. It is well-balanced, and lighter than expected.
 * A foot and a half by a foot and a half flat locked iron box. With a simple iron look to it.
 * Inside there is a beautifully-smithed sword handle and hilt made from silver with an acorn-sized emerald set on each side of the hilt, right in the centre. The blade extended for an inch before it's broken off at a jagged angle, which seemed to have broken off at some point.

In the oblong rock formation at the bottom lay a smooth polished stone that looked like a cat's eye. It has a yellowish color to it and there are striations that refracted light around it. At one end, there is a pointed oval line carved in about three inches across.

The party found 100 to 120 of metallic objects around the oblong rock formation. This were symbols of deities that are outlawed by the Empire. They were of different shapes, configurations, and designs. A number of them were scattered about, some in disrepair, with actual pieces of dried barley and other grains around it. There were symbols and worship idols from:
 * The Archeart,
 * The Changebringer, Avandra
 * The Moonweaver, with the two crescent moons across the silver cross
 * The Wildmother, Melora, with the hook and the wreath
 * The Stormlord, Kord
 * The Everlight
 * The Lord of the Hells, Asmodeus, that has a dark horned crown
 * The Strife Emperor, Bane, the deity of conquest, with a series of chains and shackles across what looked to be almost a coffin-like box
 * The Scaled Tyrant, Tiamat, with the clawed hand
 * The Traveler

The party took what was necessary and what was of interest from that pile and made their way back out, closed the pathway the merrow had to the safe house, and completing the job of which you are tasked by the gentlemen.