How to complete Mystical Key and Polar Opposites in Crimson Desert

The Mystical Key and Polar Opposites quests follow the arm-wrestling and chimney-cleaning tasks in Hernand. You must use an Engraved Key to unlock a room in Hernand Castle, then employ the Axiom Force ability to align dials and complete a circuit in the Abyss. To start Mystical Key, examine the Engraved Key in your inventory and hold CTRL (LB on controller) to inspect it.

Equip the Hernandian Attire to enter Hernand Castle and approach either gate. Once inside, go through the second gate into the inner keep, take the stairs to the right, turn right at the top, and use the Engraved Key on the first door on your left. Loot the chest in the room for a Faded Abyss Artifact (which lets you respec) and enter the portal to the Abyss.

In the Abyss, activate the Abyss Nexus by stepping on the pad in front of you, then follow the cobbled path to the building ahead. A white crow grants the Axiom Force ability.

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