To unlock the trap door in Lair of the Harpy in Jakobs Estate in Borderlands 3, you have to match the stage to the most frequently displays poster in the area.
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Match the stage to the most frequently displayed poster to unlock the trap door in Lair of the Harpy in Jakobs Estate in Borderlands 3
Then press the button on the right.
The final setup for the stage to unlock the trap door in Lair of the Harpy in Jakobs Estate in Borderlands 3
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