Uploaded September 2025 | Updated September 2026, 1 week ago

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So there is a "secret" boss you can unlock by completing a certain side quest line in Borderlands 4. By unlocking this boss, you can then use Moxxi's Big Encore to farm Willem.

This is the questline you need to complete to unlock the Willem boss:
Enter the Electi part 1
Enter the Electi part 2
The Council Divided
A Traitor Within
The Moles Gambit
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