Baldur's Gate 3 has this place called Moonrise Tower where the Absolute's Seat is. Fabulous place, fits all seasoned adventures, and the security? Well, could've been better.
From Moonrise Towers waypoint I went lower to the back docks, where we have a bonus illithid power. After taking care of the adepts, we go to the prison.
There are easier ways than fooling around like I did, but I tried throwing in a lot of those "little tricks" I thought of through the gameplay.