How do I get the white crystal


Hint 1 of 6:
First of all, you need to have two people in the chamber.

Hint 2 of 6:
There's a locked box.

Hint 3 of 6:
Unlock it with the golden key.

Hint 4 of 6:
(You may have to move away from the sarcophagus feet to close the stairs.)

Hint 5 of 6:
Try pressing the button that appears.

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