What do I do to the priest in the temple?

Hint 1 of 10:

This is where you must restore the Quetzlcoatl myth.

Hint 2 of 10:

It would help if you played the part of this god.

Hint 3 of 10:

Actors usually like costumes.

Hint 4 of 10:

There's one in the maze in 800 AD.

Hint 5 of 10:

Put it on while you're in the Interkron and then step out.

Hint 6 of 10:

Now, you need a symbol that will be carried by the Spaniards.