A New Type of Door

Hello again, I'm working on several things that I'll show you over the next few days.

Today it's about this new type of puzzle. It's usually associated with optional content, so it might be more difficult to solve than other puzzles.

All kinds of rewards await you on the other side of the door.

What do you think Cira should do to unlock that door?

As always, thank you very much for your support :)