Doors in Hogwarts Chapel Legacy

In the Clock Tower there are four doors blocked by bars, and it is the clockwork, or rather, the pendulum, that prevents the bars from opening. Go down to the courtyard of this same Clock Tower, where Lucan Shumsby arranges duels for us, and look up. The pendulum passes sequentially past four circles, on which, - for sure! - badges are shown that duplicate the badges on the doors.

Secret . Spell GLACIOUS. Therefore, in order to open these doors, you will need to complete the quest "Madame Kogawa's Task I", since this spell is a quest reward.

The pendulum bears the icon of this spell. Frankly, I did not believe that the spell would work on this huge mechanism, but it's magic, Harry worked. To quickly unfreeze the pendulum, use the long-range fire spell Confringo (obtained for the story quest "In the shadows of the crypt"), if you are not in a hurry, then wait half a minute and the pendulum will thaw itself.

If you look from below, you can see that the bar with the door icons has been duplicated twice to make it easier to cast Glacius when the pendulum bar passes by the corresponding icon. So rushing like crazy from the bottom to the top of the tower (for the sake of the topmost door) is not required in 30 seconds, running around a little less)))
When you freeze the pendulum from above, aim?You can use RMB, otherwise the frost will fall on the railing.