Session Journal - Avoid the siege of Swanport

Lady Sera talks to Lani about being a part of the sorcerers guild. (The head of the tower of the green is Jane Wearing, a very young looking woman whom I will be talking to.) On our way there, horns sound. All forces inside the city mobilizes. There are troops on the walls. A legion assembles on the field. A cloud of wyverns with riders are seen. Troops are also heading towards us. Will this turn out a siege? While we all wait, the city prepares for the siege/attack. (We learn later that this is a Kilren coalition, which is a recently created group that supports the green dragon and attacks Duskhan targets.) This looks very serious, as even the holy knights are coming out of the temple.
 
As our goal is to keep the alliance between the Forest elves and the Deep elves, we choose to run and not get trapped inside a besieged city. We make haste to the area in which the envoy of the deep elves was last seen, towards the volcano. Lady Seraphina, Rithari, Honorous, and I leave Swanport.
 
We travel without much issue, and at night we make camp. Rithari is 3rd watch and feels vibrations. Feels like the stride of a group of massive individuals. She banks the fire to make our camp less visible. She sees 6 giant creatures, walking towards Swanport. Huge humanoids. They are stone giants. We avoid their notice and keep going. Is this a concerted effort against Swanport, and how were giants convinced to participate?
 
Day 1:
We hear the river, and then find 5 creatures. They hiss and roar, and are lizard like with needle-like teeth. They are yuan-ti, in either a hunting or a war party. We quickly do away with them. The rest of the day went fine.
 
Day 2:
There is a group of trolls that treed something humanoid. One of them is a rot troll, who is decomposing and smells foul. We take care of them and save a poor dryad. She says that her sisters have seen a deep elf by the tower. We come to a huge waterfall (Brawnwynn's Tears Falls), with a rope bridge. On the other side, the forest is more dense. There is a cave behind the waterfall, that Honorous notices. We enter and explore the cave, but there are now carved steps in it, with a chamber at the end. A narrow opening where you can squeeze into, or a passage that smells of water, or a collapsed passage ahead. Honorous checks the rubble, and it looks like the ceiling caved in a bit and it obscures the rest of the passage.
 
Taking the squeeze path, there is a room that used to have a fire, judging by the accumulated soot on the ceiling. There are drawings with red paint and soot. Scenes of humanoid figures that appear to praise a taller central figure, with images/symbols above. Swirly pattern, 8pointed star, and an inverted star. Sera draws what we see.

Straight ahead from the main passage opens to a flooded room, and the water is dark and stinky. Something small and pale slithers and moves in the water. Last we clear the rubble, and see a small ledge and there are steps carved down to a stone beach that smells a little salty. The chamber is large (240 ft wide in crescent shape). There is a rocky chunk sticking out of the water and stalagmites. Sera sends her dragon to light out there. The place is a large underground lake. More than 100 ft wide, but that is the beginning of the ledge of the island. We'll camp here for the night, but not too close to the water.