How do I access the Looking Glass Knights door in Scholar of the First Sin? I've made my way around to unlock the other way and have beaten the annoying Gargoyle. The elevator is still up and I can't pull the lever.
In Scholar of the First Sin, the stone soldiers in the room with the stone golem no longer come to life. Instead, you'll need to proceed to the next room with the two iron chests. Two Masked Manikins will attack in this room, you'll need to lure them into the previous room. Kill one of them right next to the golem and he'll come to life and activate the elevator.
In the original version of Dark Souls 2, killing the stone soldiers in the same room will activate the golem.
You have to activate this golem by killing an enemy near him, to activate the elevator outside. If this is done correctly, the golem will receive the souls, not you.
He can be found at the top of the ladder in the room with the elevator. Once you have activated him, you follow the path back around, ride the elevator up, and you will find a key in one of the chests at in the room at the top.