Luminescent Caverns Fisch Roblox Guide, What is Coming!

The next major update for Fisch is almost here, and it’s shaping up to be one of the biggest yet. On September 20, 2025, at 12:00 PM EST, players will gain access to the brand-new Luminescent Caverns, a mysterious new area packed with rods, secrets, and possibly even hidden entrances tied to Desolate Deep. If you’re excited to dive into this expansion, here’s everything you need to know before it drops.

Luminescent Caverns Trailer Breakdown

The official teaser trailer gave us our first look at the Caverns, a glowing underground zone with crystal-lit caves. It also teased several new rods, including what looks like the Ruinous Oath and its alternate form, the Luminescent Oath. Both rods appear to be powerful, with one emphasizing high lure speed and luck.

Another interesting reveal is the Boom Ball rod — an oversized, almost comical rod with unusual stats. Early leaks show wild numbers like +200% lure speed but heavy penalties to resilience. This rod may be tied to the mysterious crack in Desolate Deep, suggesting that players might need to trigger an explosion or solve a puzzle to unlock it.

Possible Connection to Desolate Deep

For months, players have noticed the glowing eyes and hidden crack within Desolate Deep. This update finally seems to tie those mysteries together. To find the crack:

1. Swim into Desolate Deep.
2. Instead of turning right to exit, turn left.
3. Look for the NPC holding a chain near an explosive — the crack is beside him.

This area may serve as either the entrance to the Luminescent Caverns or as part of the Boom Ball unlock method.

New Rods Teased

Several new rods were shown off in previews and Discord leaks:

• Boom Ball – Gigantic rod with extreme lure speed, massive weight capacity, but major resilience drawbacks.
• Ruinous Oath – High luck stats, infinite max kg, with a unique lore connection to the Caverns.
• Luminescent Oath – A radiant variant of the Oath, seemingly tied to forbidden power.
• Evil Pitchfork (reworked) – Once an admin-only rod, now redesigned with updated stats and visuals, potentially becoming obtainable.
• Cerulean Fang – Balanced rod with 75% lure speed, 190% luck, and strong resilience.

Why This Update Matters

The Luminescent Caverns update isn’t just adding a new map — it’s making previously unobtainable rods available to players and expanding the game’s lore. With over 100k concurrent players before the patch even dropped, this release could easily push Fisch into record-breaking territory.

Fisch Codes – Are There Any?

• Check back soon after the update

Check out Fisch Codes List for those interested!

How to Prepare

• Explore Desolate Deep ahead of time and locate the hidden crack.
• Stockpile bait and upgrade rods for when the new area unlocks.
• Keep an eye out for puzzle mechanics involving explosives or chains.
• Join the official Discord or community streams for live discoveries as players figure out the update together.

The Luminescent Caverns promises new mysteries, rods, and challenges for Fisch players. Whether you’re hunting for the Boom Ball, grinding luck-heavy rods like the Ruinous Oath, or just exploring the glowing caves, there’s plenty to look forward to. Make sure you’re ready when the update launches on September 20 at 12:00 PM EST — this is one you won’t want to miss.