"Pirates of the Caribbean 4": Usage of the Holy Grail:
Ceremony: Two holy grails from Juan Ponce de Leon are needed, tears of the mermaid.
Two holy grails were used to fill the fountain of eternal age, one of which put the tears of a mermaid into it, and the other holy grail was kept. When two people drink the spring water in the Holy Grail at the same time, and drink a glass of mermaid tears, their lives will be prolonged. The prerequisite is that the other person drinks another glass of spring water, and this person will die on the spot.