
Recent updates in Fisch have introduced a wealth of new content, spotlighting the remarkable Luminescent Cavern. This vibrant area serves as an expansion of the Desolate Deep, requiring players to gather special Keystones for entry. Each gamer has a distinct combination of Keystones needed, which are distributed across various islands. This guide will navigate you through the Keystone locations and provide step-by-step instructions for accessing the Luminescent Cavern in Fisch. Let’s dive in!
Comprehensive Keystone Locations in Fisch
Before embarking on your quest for the Keystones, head to the back of Sunstone Island where the entrance to the Desolate Deep awaits. Begin your dive beneath the Red Buoy and navigate to the right until you discover a Mysterious Crack. Interact with the three pedestals found here to identify the specific Keystones required to access the Luminescent Cavern.
Once you have determined the necessary Keystones, you can seek them out. Below are the coordinates and brief descriptions for each Keystone location needed to unlock the Luminescent Cavern:
- Cliff Keystone: Found at Castaway Cliffs (coordinates: 473, 230, -2159), nestled in a gap next to the ledge leading to the island’s second tier.
- Mushroom Keystone: Located on Mushgrove Islands (coordinates: 2666, 130, -717), positioned atop a boat in the Alligator habitat area.
- Fossil Keystone: Situated at the Ancient Isles (coordinates: 6065, 225.5, 259.5), observed atop a wood stack beside a crane near the merchant.
- Snowflake Keystone: This is found in Snowburrow (coordinates: 2788, 153.5, 2603), hidden within a cave next to a pine tree. Note that Snowburrow is accessible only after interacting with three cracks in the Snowcap Cave.
- Volcano Keystone: Located at Roslit Volcano (coordinates: -1970, 175.4, 268), situated in the middle stone inside the volcano.
- Skull Keystone: Discovered on Forsaken Shores (coordinates: -2797.5, 209, 1544.2), right next to the pirate NPC known for map repairs.
- Lightning Keystone: Found on Grand Reef (coordinates: -3406, 134.2, 262.2), located on the smaller island to the left of the Shipwright’s location.
- Turtle Keystone: Discovered at Terrapin Island (coordinates: 57, 149.5, 2032), inside the hidden Terrapin Hideaway.
- Sun Keystone: Located on Sunstone Island (coordinates: -935, 223, -984), found within Merlin’s Hut.









How to Access the Luminescent Cavern in Fisch
With all the required Keystones in hand, it’s time to unlock the Luminescent Cavern. Return to the Red Buoy, equip your diving gear, and plunge into the depths of the ocean. Follow these steps to successfully access the new area:
- Begin from the Red Buoy and swim straight down to the caution sign.
- Veer right and continue straight until you encounter a glowing blue coral.
- Take another right; you will spot the Diver NPC at this juncture.
- Locate the three pedestals positioned on the ground nearby.
- Utilize the keystones and place them onto their corresponding pedestals by hitting the ‘E‘ key.
- If you attempt to place a keystone that does not match the required type, an error message will prompt indicating the correct one that’s needed.

Once all three keystones are successfully positioned, the mysterious crack in the cavern wall will open. Swim through this opening, and you will gain access to the Luminescent Cavern. However, be aware that you’ll need to navigate across the Mysterious River before you can start fishing. Once crossed, you can explore and catch new aquatic creatures leading to further enhancements in your fishing adventures.
This concludes our detailed guide on unlocking the Luminescent Cavern in Fisch, along with the locations for all necessary Keystones. What marvelous fish have you discovered in the new aquatic bestiary? Share your experiences in the comments below!
Leave a Reply