I'm stuck on a puzzle in the City of the Dead. There is a lever in the middle of the room, to the left (if you're looking at the lever and standing in the back of the room) is a gap and a switch on the wall, to the right is a gate and a movable block behind it, and there is a large gate in front of the lever in the middle. When you pull the lever the large gate opens, and when you release it the large gate falls shut.
I've figured out how to get past the large gate using the Soul Splitter, and past it there was a Shadowbomb which I was able to use on the switch on the wall. This opened the right gate and I now have the movable block but I can't for the life of me figure out what I'm supposed to do with it to get my normal not Soul Split self to the other side of the gate. In other puzzles you could just take it up to the gate and leave it there and it'd catch so the gate wouldn't close, but that doesn't appear to be working (it just pushes the block out of the way).
Here is a picture of the room to help as well.