Breaking Into the Gloomy Cavern in Infinity Nikki: My Spark-Filled Journey

So there I was, standing on the stunning Firework Isles, staring at a massive, immovable boulder blocking the entrance to the Gloomy Cavern. I had heard whispers about the treasures and secrets hidden inside, but the game just laughed at me with that giant rock. Naturally, I tried everything—jumping, dashing, even pleading with Momo—but nothing worked. If you’ve stumbled upon this cavern early in your adventure, you probably felt the same frustration. But fear not! The answer isn’t a glitch or a secret airship; it’s woven right into the story, and once you know how to trigger it, you’ll be lighting up the sky in no time.

First things first—did you reach the quest “Showdown! The Gloomy Cavern!” yet? If that name doesn’t ring a bell, you need to keep pushing through the opening chapter of the Firework Isles storyline. The whole arc is a delightful mix of mystery, whimsy, and fireworks (duh), and it all kicks off when Marques Jr pulls the Holy Sword from the Stone Pillar Ruins. That moment is absolutely pivotal. Without it, the boulder stays put, and you’re stuck on the outside. So if you’re wondering why you can’t just blast your way in, it’s because the game wants you to experience the narrative first. Honestly, I appreciated that touch—it makes the eventual opening feel earned.

Once the quest activates, head back outside the Gloomy Cavern entrance. That’s where the magic happens. Momo, ever the attentive companion, will notice a drawing on a stone tablet. You know what that means: puzzle time! The tablet shows the locations of three fireworks that need to be ignited simultaneously—or as close to it as one Nikki can manage. My heart skipped a beat because I half-expected to need some rare crafting material, but nope! You don’t need any items at all. Instead, you rely on the Fiery Glow outfit’s firework ability. If you’re like me and you constantly forget to switch abilities, here’s your reminder: hold L2 to open the shortcut wheel and select the Fiery Glow outfit before you start. Then, all you have to do is stand by each firework and press square. Easy, right?

Now, let’s talk about actually finding those fireworks, because the tablet clue is a bit… abstract. The first one is practically a gift: it’s right outside the Gloomy Cavern, sitting on a stone panel. You can’t miss it, and it’s a nice confidence booster before the real hunt begins.

The second firework, though? That one tested my patience. It’s tucked away at the Crescent Moon Ruins, far to the north of the Firework Isles map. The terrain there is elevated, and if you approach from the wrong angle, you’ll spend fifteen minutes jumping against cliffs like a confused kangaroo. I highly recommend coming in from the southwest side—there’s a gentler slope that leads right to it. When I finally spotted the glowing fuse, I actually cheered out loud. Is it just me, or does finding a well-hidden objective in this game feel absurdly satisfying?

Last but certainly not least, the third firework waits in the Flaming Forest, southwest of the map. This one comes with a small catch: a handful of enemies are milling about, and you’ll need to purify them before you can safely interact with the firework. I’ll admit, I got a little sloppy here and had to retry once after being knocked back mid-ignition. Pro tip: clear the area first, then look for the rental Whimcycle station; from there, head left, and you’ll find the firework nestled among the trees.

After all three fireworks burst into the sky, the ground trembles, and that stubborn boulder finally rolls aside. The Gloomy Cavern opens up, ready for you to plunge into its depths for the showdown and whatever glittering goodies await. By this point, I felt like a true fireworks maestro—and trust me, if I can do it, you definitely can.

If you’re playing in 2026, you’ll be happy to know this quest still works the same way; I’ve run it on both PS5 and mobile recently, and it’s as magical as ever. So grab your Fiery Glow outfit, follow the clues, and turn that cavern from gloomy to glorious. Happy spark hunting!