Work on some rules now.

Katy looks at the now blank notebook and bites her lip a bit as she ponders on the rules she could add, she has some fantasies she could try out, but first some safety rules.

Old Rule: Katy is the sole owner of this notebook and can summon it at will and make it vanish at will in to a pocket dimension.
Old Rule: The notebook is indestructible.
Old Rule: If Katy wishes it, she can return the world to the time this rule was written (start of this story path)
Old Rule: Katy can think of a rule and it can be added to the notebook at will.

With those rules in place Katy is happy that she can... entertain a few of her fantasies she has, some of which are a more... well dark.

Rule log (list of rules so far)
Old Rule: Katy is the sole owner of this notebook and can summon it at will and make it vanish at will in to a pocket dimension.
Old Rule: The notebook is indestructible.
Old Rule: If Katy wishes it, she can return the world to the time this rule was written (start of this story path)
Old Rule: Katy can think of a rule and it can be added to the notebook at will.