Special Notebook

The Special Notebook of God is an unnamed object from Oda's God's Gift for the Future one-shot, though he lent it to Bran for one day.

Description
The special effects of the "artifact" will only appear if the user writes with the Pen of Fate. Anything written with it will happen, just like an agenda of the future. To cancel the effects, the user must use the Eraser of Fate; using just any eraser is useless, as the written event will happen anyway.

Trivia

 * This notebook's concept is similar to the Death Note from the series with the same name. It is a notebook belonging to a Death God that will kill the people who have their names written into it.