How to enter the maze of Kabi mirror on the left side of Mustard Mountain (with pictures)

When you get to Kabi's position in your picture, go to the far right, quickly turn around and enter with the skills that can destroy iron (like my universal sword, or the flame in the previous scene), or enter through the button door above (the button door is not easy to enter), and then you get to that scene, where there is a self-explosive monster and several missile monsters.

(ps: Questioner, have you really never been there? Is that icon on? =? =)