Behind the Lock

Head west to find a door with a mirror. Interact with it and use the Magic Chisel to crack it open. Move the Chisel with the Left Stick and press the or button to strike when the controller vibrates. Repeat this twice to break the seal and open the door.

Move forward to find a Nornir gate and a climbable cliff to the right. Turn away from the gate and look up at the wall where you came from to find the first Rune.

Stand to the right of the gate and look up to find a Shatter Crystal. Shoot it, then shoot it again when it lands near the coffin to remove sap and open it.

Climb the struts to your right and drop onto the platform to the left. Pick up the small sack of Hacksilver.

Face the north wall to find the next Rune amongst the debris. Drop down into the corner to another platform.

Walk to the north edge and turn left to face the same wall as before. The final Rune is on top of blocks of ice. Drop down, pick up a Glacial Catalyst, and open a Hacksilver chest.

Return to the top and kick the chain down to reach Sindri’s Shop.

Talk to Sindri. Use the Frozen Flame to upgrade the Leviathan Axe to Level V, unlocking final skills. You can also upgrade the Grip of Tanngiost to its final level with Leiptr Alloy.

Exit the shop and access the Skills page to unlock new skills.

Drop into the Dining Hall and head to another door to use the Magic Chisel.

Follow the linear path and check the east wall to find a world tree stump. Take a Shatter Crystal, run back the way you came, and look to the right when you reach the pillar. Step over it to find a coffin. Throw the Shatter Crystal to destroy the sap and open the coffin.

Return and grab another Shatter Crystal. Look above the corridor where the stump was to find more sap overhead. Launch the Shatter Crystal and shoot it to drop a Light Crystal.

Pick up the Light Crystal and take it back north, then to the right to a pedestal. Shoot the pedestal to materialize a Realm Tear containing Dust of Realms and 500 Hacksilver.

Return to following the path and open the doors at the end to arrive at a dock.

Take a right and follow the path around the back to find a ledge to boost Atreus.

Head to the other side to find a wheel. Look up before using it and strike the runic disc holding the trolley. Wait for Atreus to climb on, then spin the wheel to bring him across.

Toss the axe at the runic disc on top of the trolley, then have Atreus drop down the chain for you to climb. Leap to the trolley and recall the axe to be carried back.

Open the Hacksilver chest against the east wall, leap over the gap, and take a right to kick down a shortcut chain.

Follow the path under the thumb to find another magical seal to use the Chisel on. You will return under the giant's palm. Climb the chain to reach the dock.

An optional Hidden Chamber of Odin is available on the northwest wall. If you are at least Level 5, you can attempt it.

As soon as you enter the Hidden Chamber, look left for the Jötnar Shrine. Continue down the path to the elevator.

At the bottom, you'll find a Hacksilver chest, a Mystic Gateway, and a coffin at the top of the stairs. Head back down the stairs, leap the gap, and open another Hacksilver chest before reaching the arena.

Before the battle, equip Charge of the White Bear and the fully upgraded Blessings of the Frost. Consider having a Resurrection Stone.

Approach the figure in front of you and strike it to begin the battle against Gunnr, the first Valkyrie.