Items mysteriously left in the world, notebooks, pens, and hourglasses. They represent the past, future and present respectively.
I heard that if you get a notebook, you can destroy history, if you get a pen, you can tamper with the future, and if you get an hourglass, you can suspend the present.
If you get all three, you can make a wish to God.
But you only get one chance, because if the wish comes true, God will take back the items he left behind.
But no one has been able to find these three items for thousands of years.
Concept: past, present, future