There were many fence doors controlled by organs before you went in, remember? Where is the middle wall inlaid with a slate (or the fireplace came up, I forgot) (puzzle)? The white one is easy to identify. Take it away, keep walking, go to the puzzle and start the puzzle.

You didn't have a puzzle before. It should be the stone that you didn't take to open the puzzle. You should find a picture missing from the puzzle, right? Which missing picture is the slate in your hand. After finishing the puzzle, the door behind you will be big. Find the second slate that opens the door (that is, the snake tail) and the badge of the saddle family, and then the nearby armored soldiers will move. Run, there will be soldiers with halberds on the road. Pay attention to press qte to hide. Then go out, walk to a mechanical device like a millstone, put the badge in, and trigger the mechanical device to come out an upward staircase. Then I'll make peace with Leon. Good luck!

Hope to adopt!

In addition, at this time, you have two slates to open the gate, and the third and last slate is in a place full of magma. Don't forget to take it. I have gone through customs five times. Ask me if you don't understand.