B6 overlord 740x487
The Overlord is the End Boss of Book 6.

You can only attack The Overlord with Energy.

Name (Tier) Cost Gold 50x50 Notable Drops Total HP
The Overlord V Free Black Crystal 20,000,000

You can sell the Black Crystal he drops to The Balin Miners for 50 Platinum. They are located west of the Windown Mountains. You can also keep the Crystal and use it to Enhance items in the Kirsinti Treasure Shop located in Book 6.

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