Zelda looked at her parchement, thought anout the answer for a moment and started writing:

The Zeroeth law of Arithmancy refers thet spells and curses can be represented by numbers. It is a law that is used in all sorts of magic. Zero is considered to be a powerful number, used while changing codes of spells and curses into normal form. Zero changes all other numbers into identifiable numbers which means that if a number is added or subtracted by Zero, it will remain as it is. The Zeroeth law of Arithmancy can undo any spell. Zero refers to "emptiness" which suggests change and decay. It means, wiht the help of the Zeroeth law we can change or decay every kind of curse or spell.