The main barrier to the boss room is a water-locked door. You need to light four altars while underwater – but fire doesn’t work in the new version. Instead, you must deposit one Glowing Urchin on each altar.
If you want to optimize your path or need help with a specific puzzle variety, let me know: Which you are currently stuck in? If you are missing a particular inventory item ? lost lagoon walkthrough new
This route is optimized for the 2026 random tide system. Follow exactly. The main barrier to the boss room is a water-locked door