The Leviakan is part of the "Mistbound Sea" questline in the Samora Island Faction Quests, and to get it, you'll need to complete the 3 Remote Islands quests, followed by The Stolen Relic and Ancient Shrine. Once you have Catastrophe of Ancient Times, you can head to Bergel Island to begin the boss fight against the Leviakan in Crimson Desert's DLC. Be warned, this is a mechanic-heavy fight, so here's what you need to do.

10 new bosses have been added to Crimson Desert with Charting the Unknown. Check here if you want to know what they are and where to find them.

Before the fight, equip a Diving Suit, bring a Wyvern, and potentially even an underwater mount, but the latter is optional.

Approach the Leviakan from the tail, where you will find a red dial as shown above. In order to destroy this red engine and remove one of Leviakan's health bars, you must Cling to it (L3), then Force Palm (R3). This will be the main method of attack for the remaining air vents.

Continue moving up the spine of the Leviakan to find and destroy your second power source.

At the middle part of the Leviakan, you will find two puzzles on either side at the power source. Your goal here is to use Force Palm to punch the pushed-out nodes so that they activate, causing a blue line to power the back.

You can do this on both sides by hitting the bottom middle node, then the bottom right one.

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