Black Temple Scenario: Essence of Order

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It is a warlock green fire questline. After I defeated Essence of Order, there is a guest were I need to kill Imps and loot the gold and it should lead me to the last boss, but nothing happend. The door is closed. I am stack with "Infiltrating The Black Temple" quest. It sais: "Uncover the Council`s Objective iside of The Black Temble". I know were he should be, but he is not there. Any HELP! please!!!!

I alos watcht alot of yoputube videos about it, but still NO help!

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Walk against the door it's a portal.

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it will force you to summon imp and this imp will show you the path this is the fun part of quest