The fourth region you’ll unlock is Lake Cynon, which is also the location of the Lymbic Forge puzzle sequence. Each part of the sequence requires a combination of exploration, fighting, and resourceful interaction with the surroundings, paving the way to superb rewards. This article guides you through all three puzzles — from striking stone pillars to manipulating torches and gears, ending with access to the Forge Core and the story’s next major progression.
How to Solve All Lake Cynon Puzzles
Lake Cynon marks the fourth region you’ll unlock in Hell Is Us.Here’s how you can solve all three puzzles for Lymbic Forge:
Puzzle One

Not far from the meadow, you’ll come across a circle of five stone pillars standing beside a stagnant pool. Nearby stone slabs hold carvings that reveal the sequence needed to solve the puzzle. To progress, strike the pillars with your weapon in the order shown: first the Crown, then the Droplet, followed by the Key, the Star, and finally the Chalice at the top of the steps.
Completing this sequence unlocks a hidden compartment behind the wheel, where you’ll find the Spindle Gear. Insert the gear into the nearby mechanism to lower the water level and continue forward.
Puzzle Two

The next step is the Lymbic Forge challenge, marked by an inscription on the wall that reads: “To the north and to the south, the way will be revealed.” To solve it, start by facing south and rotating the two torches attached to the wall with the riddle.
Then turn north and repeat the process with the pair of torches behind you, ignoring any other objects in the area. Completing this puzzle rewards you with the Order of the Eye Sigil. As you continue into the larger chamber filled with enemies, you’ll also discover the Phol Guard Sigil.
Puzzle Three

Once both sigils are set, the door opens into a vast chamber dominated by a massive wheel. To proceed, insert the Spoked Gear first, which lowers the water slightly and reveals the lower level.
From there, you’ll eventually come across the Large Gear. Placing it into the mechanism drains the chamber completely, granting full access to the bottom floor.
Unlocking the Lymbic Forge Core
At the lowest level, cross the bridge and defeat the Hollow along with its blue Grief Hazes. After the fight, open the sarcophagus to collect the Fundamentals of Lymbic Forging, Amine Prism: Sigma, Aster’s Band of Domination, and the Hammer of Modus.
Head back to the water wheel chamber. Place the Hammer of Modus into its slot to open the sealed doorway. Inside, claim the Sword of Grief from the pedestal, clear out the incoming foes, and finally, install the Keystone of Grief to trigger the cutscene and advance the story.