DND wave echo cave

We see an apparition emerging from the floor. The ghost attacks Sunshine with her finger. We kill the ghost and find a chest full of coins that we give to Kunju. We head north, up a flight of stairs, Sunshine breaks opens a door, enters a room with a spherical green flame on a brazier, and hears the words "gear, stop, who are you?". Sunshine is the only one who hears it. Sunshine starts telling the ghost about their life story, the flame has never heard of Neverwinter. 

The flame is asking are you friend or foe, and then what is the password. Sunshine says kthxbai and heads out. Sunshine is telling us about the guardian flame. We can see a lot of weapons. Me and Pho go in and Pho tells the tentacle eyed monster (the spectator) behind the flame we are friends, its job is over, and it can go, and it poofs. We check out the room, get buffed by the flame and we get a cool mace called the lightbringer. 

This entire time we have been inside the cavern, we do hear a constant beating, a booming from the heart of the mountain. There are arcane sigils and the wards that have something to do with the fire. we leave the fire and go north. 

We go down some stairs, that opens up into a massive cavern. There is a cavern with massive surges of water causing booms. This is the wave echo cave. The head of a giant octopus emerges from the depths. We attack it, kill it, take a short rest and head west. We come across a furnace with mummified bodies of gnomes, orcs and goblins. A water wheel is not working, the place has not been used for a long time. 

A glowing round shape jumps out of the furnace. A flaming skull comes out of the furnace and the mummified corpses around us start moving. We kill the skull, which begins to reform.