A classmate in Harry Potter's magic awakening has been unable to open it. Where is it?

The clue is that "a classmate can't keep his eyes open, and the crystal ball can't give him any warning". This clue is also very simple. You only need to enter the main building of the castle from the map in the upper left corner, and then choose the divination class classroom. There are a bunch of crystal balls in the right front of the classroom, one of which is obviously different from other crystal balls. Click to get clues.

Jigsaw Treasure Hunt 9.23 Location:

Open the Harry Potter tour and fly to the small house on the left side of the castle. There is a golden light spot in front of the house. Click on the light spot to get the first puzzle, then open the map and send it to the divination class. Click on the white crystal ball on the right side of the classroom to get the second puzzle.

The external puzzle reward is not a legendary card, but a mysterious new card, which may be a new partner or a spell.