Lonely Tub

This treasure chest is located under one of the Coliseum stands in the Undermine. To find it, go to the Coliseum entrance located at the coordinates: /way 50.43, 28.63. Then turn right and walk under the stands, heading to the coordinates: /way 58.77, 17.96. At this point, you will find the item Fire Extinguisher. Once you pick it up, a blue cooling stream will start emitting from the item.

After that, turn in the opposite direction and head to the coordinates: /way 59.36, 19.11. There you will see an empty tub engulfed in flames, with fire blazing above it. Use the Fire Extinguisher to extinguish the flames. Once the fire is out, you will be able to claim your reward.