1

The party's light disturbs a swarm of bats. They descend from the ceiling and attack anyone holding a light.

2

Some quartz crystal sprout from the wall. They can be broken and taken as souvenirs, but aren't worth much.

3

There's a strange patch of bright orange moss on the rock floor. It will begin to grow over any living being that remains on it for more than 10 minutes. The being on it takes Roll 1d4+3 poison damage every 10 minutes they remain.

4

There's a pouch of coins stashed between some stalagmites. Passive perception of 14 or higher will notice it. The pouch contains 17 GP and 8 silver.

5

Some rats forage amongst the stone floor. They seem to have found some bat bones and a mushroom.

6

There's a pool of water that's deceptively deep. Upon a party member inspecting it, a choker emerges and immediately tries to drown them.

7

Glowing mushrooms grow from the walls. A successful nature check of 15 or higher reveals they are not toxic to eat, and actually make one's mouth glow after.

8

Water drips from the ceiling, forming beautiful rock formations that look like bacon.

9

A centipede falls down the back of a random party member's shirt. It's harmless but unpleasant.

10

There's a drugear living in the darkness. He's half crazed, only speaks Undercommon, and is wary of the party.