After going up the elevator, walk forward a little.

Once you enter the temple, go down the steps and walk forward a little.

After leaving the temple, turn left.

Continue down the corridor, looking to the right side.

After climbing the steps, go forward.

Entering the hall with the second spotlight, go forward and keep to the right.

Go forward to the third bell, which is on the left side.

Proceed further to the end of the hall along the left wall.

Go forward a little and there will be a shield next to the lever.

Once the gate opens, turn left.

After crossing the wooden bridge, enter the next hall and go forward to the wall.

Once you reach the end of the hall with the giant generator, turn left and enter the room with the book.

Note:

• This is the point of no return. Make sure you have 12 shields cleared. If not, go back and find the one you missed.
  
• The remaining 8 shields are in the Well of Dreams room (final event).

I have prepared a small hint where all the shields, generators, books and boss spawns are marked in the final event. As you can see in the picture, the shields are marked in yellow.

Next, I will show the location of each shield separately, starting from the left of the entrance and moving clockwise.

P.S. After defeating both bosses, you must enter the runes you found into the books - on each book, select the page that displays the same rune as the nearest shield. Once this is done, the portal will deactivate and a bomb will drop onto the floor, destroying one of the Skaven constructions at the edge of the arena and opening a path to the exit.

After jump off into the arena, turn left and go to the wooden stairs.

Go up to the second floor and go to the torch.

Jump off and get to the room.

See the generator, go further to the next room.

Go further and approach the torch.

Proceed further into the next room.

Go to the wooden structure and go up to the second floor.

See the generator, go down and the last shield will be next to the torch.

https://youtu.be/Y1ZfZIj1ayI?si=woKpEqvqFWMP6N-X Credit: Momo_oo7

You can find the rest of the challenges for this map in this guide.
https://gtm.steamproxy.vip/sharedfiles/filedetails/?id=3264185268