In the tavern a very scruffy human approaches Elmer and says he heard they’d been asking around about getting some…yeast wink and he knows where to find some if they want it.  He offers to guide them to it for a few gold pieces. They interrogate him a little and it turns out his name is Ranken and he’s a miner, working in various mines near the town. They follow him to a mine about ten miles north of town and he guides them through the first few passages.

After a few branches the walls of the tunnel start to glow with bioluminescent fungus and in the first chamber they come to they’re attacked by a lurking Flail Snail that downs both Dubya and Ovilyn before they manage to defeat it while Ranken hides in the hallway. The shell is worth a thousand gold pieces.

In the next chamber as they pass through they’re ambushed by a Grey Ooze hiding in the entrance, they manage to beat it quite easily.

They find a small underground stream running through the next passage and they’ve been encountering more and more glowing mushrooms and other types of fungus.  Failed dexterity saving throws while traversing a passage or chamber result in a roll on the wild magic variant table I found, including Dubya and Ovilyn being surrounded by soft harp music, Elmer being surrounded by chirping birds and hissing all their Ses like a snake, Dubya shrinking three inches, Mirine growing six inches and getting a strength buff.

Just before the final chamber Ranken runs right into a Gelatinous Cube which engulfs him and the party struggles a bit to fight an enemy they can’t actually see, throwing various things into it to try to provide a reference point to aim at.  They do eventually defeat it and get 500 gold in miscellaneous coinage from people it had eaten before them.

The final chamber is filled completely with glowing, magic mushrooms and other forms of fungus.  Dubya gets two doses of crazy magic mushroom powder that could be sold to an alchemist or apothecary, Nahala gets a dose of a potent poison and Elmer gets two mushroom based healing potions.