Devious Delvings - You're A Real Fun Guy (All Mushroom Locations)

The first 5 mushrooms are at the very beginning of the map in the arena.

The next 5 mushrooms can be found near the torch before descending.

After taking the elevator down, turn around and go to the top by going through a huge wheel. There, you should see a warpstone crystal, and next to it, 7 mushrooms.

After that go to the tome and drop down, then navigating to the first windlass go forward. To the right under the huge column you will find 15 mushrooms. To avoid running back and forth, first cut the three power sources in the following sequence:
Windlass → Orb covered in Warpstone Crystals → Generator

After destroying the generator, cross the bridge, move a bit further, and you’ll see a wooden wheel, and there are 3 mushrooms next to it.

Next, head to the second windlass. Approach the torch, and next to it, you’ll find another 5 mushrooms.

Now head to the last generator. Behind it, you will find 3 mushrooms. By this moment, you should have 37 mushrooms destroyed.
(Note: after they destroy the generator, the cave will flood, and you won't be able to return to destroy the remaining mushrooms).

After destroying of the last generator, climb up the platforms. Near the red cloth, you’ll find another 4 mushrooms.

When the bomb opens the gate in front of you, drop down and look back. There you will see 2 mushrooms.

After jumping into the arena with the rat ogre, turn right. In the corner of a ruined house, you’ll find 3 mushrooms.

Once the rat ogre is killed, the gates will open. Move forward, and on the right side of the bridge, near a pillar, you’ll find the last 3 mushrooms.
If everything is done correctly, a message will appear in the chat confirming the completion of the challenge.

https://youtu.be/Q5frRqtLpLI

You can find the rest of the challenges for this map in this guide.
https://steamcommunity.com/sharedfiles/filedetails/?id=3264185268