{OOC: Sorry, getting my games mixed up. I'll delete that post.}

Mika answered, "The goblins stole a large silver bowl called the Bowl of Plenty from the humans. We're here to get it back."

"Let's do this together then. I know the goblins are nearby somewhere. We followed them for a way before I hurt myself. They can be too far from here" says Dilly

Everyone please roll perception DC 13

on pass you see a concealed door nearby in the eastern cave wall. 

Myrith perception Natural 20 😃

(Nice Roll)

Myrith sees the secret door marked as S on the map. 

"There's a door in the wall. I'll go and check it out."

Myrith will creep up to the door and see if it's magical, trapped or alarmed.

Stealth 19

Perception 17

Investigation 7

Myrith

You see no traps or alarms. The door blends almost seamlessly with the cave.

Myrith beckons the others forward, and carefully cracks the door open an inch to see if she hears anything.

Perception 5

Hearing nothing she will open it just enough to peek around it.

Perception 13

Mika approaches when Myrith wave them forward. 

Opening the door slightly you here a jingling of bells located on the other side of the door. 

You're not sure if that alerted anyone though the jingling sound was low as Myrith did not swing the door open wide.

You see this passageway extends to a series of steps and opens up to large room you cannot see. At the moment you see no goblins. 

What do you do? 

Myrith moves a forward a few feet at a time until she can see/hear something.

Stealth 14

Perception 13

Do you do anything with the bells? Take them down or something else?

If possible, take them down, otherwise stuff them with stale bread to stop them making a noise.

Myrith takes the bells down and sneaks further in a sees a room with 2 a few bedrolls and a table with a few wooden chairs. 

In the midst of the room is a giant centipede coiled in the center of the room its eerily swivels its head towards Myrith's direction as if it knew where Myrith was this whole time. (Blindsight)

Combat, please roll initiative

Giant Centipede initiative

11

Mika is slow to realize that an actual combat is starting. 

Init 0 (nat 1), Mika goes last...

Myrith initiative 11

I am using the dndbeyond VTT for this combat. You can launch the VTT in the campaign tab.

Initiative

1. Giant Centipede 
2. Myrith
3. Mika
4. Vonnet
5. Dilly