What's in that trap?

Hint 1 of 6:

Open it

Hint 2 of 6:

With the sword

Hint 3 of 6:

Empty the trap using the cauldron

Hint 4 of 6:

Operate the mechanism according to Petroy's interpretation

Hint 5 of 6:

Raise the sword, sun and moon, then touch the crown

Hint 6 of 6:

Lower the sword and moon, then touch the crown