To open the sealed cave in Invisible Glyphs: Investigation, interact with the nearby Denstack Haze, then activate the three marked switches. A walkthrough from Nerds Chalk gives their order as Human Face → Treasure → Shovel. If the symbols shown in your game differ, follow the in-game markers; PowerPyx confirms the marked switches but does not specify their order.
Open the cave with Denstack Haze and the marked switches
- Check your active objective. You should be at the step to find a way into the cave. PowerPyx places this mission in Valley IV > The Hub and describes reaching the entrance after the Landbreaker camp and an earlier Denstack Haze interaction.
- Interact with the Denstack Haze near the cave. Both the PowerPyx and Nerds Chalk walkthroughs identify this as the key interaction for the entrance puzzle.
- Activate the three marked switches. PowerPyx says to use the on-screen markers. Nerds Chalk identifies the order as Human Face first, Treasure second, and Shovel third.
- Enter the cave once the entrance opens. Continue with the mission objectives inside.
What to do if the switches do not match the sequence
The named sequence comes from Nerds Chalk; PowerPyx confirms three marked switches but does not independently give their symbols or order. If the game displays different markers, use those in-game clues rather than forcing the sequence from a guide. The reviewed official Gryphline update notes do not explain the cave puzzle.
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Check whether you have reached the cave step
PowerPyx describes the mission beginning with Jouster’s message in Valley IV > The Hub, followed by a search around a Landbreaker camp and a Denstack Haze interaction before the cave. It lists Authority Level 15, completion of Invisible Glyphs: Discovery, and waiting for the next server reset as prerequisites. These are PowerPyx’s reported requirements; the official update notes reviewed do not confirm them.
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What comes after the entrance opens
PowerPyx’s walkthrough continues with finding Jouster and hidden supplies, investigating the cave, rescuing Jouster, continuing the search, and opening Landbreaker loot. It marks the worn-note and yellowed-note steps as optional.
#1 Best Overall
If you completed the investigation but missed the Piece of Scrap Paper collectible, Gryphline’s official update notes say you can return to its area to collect it.
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