That if someone allowed themselves to be sacrificed on the stone table without resistance in the place of another, then the stone table would break and the laws made at the start of time (not before) would be reversed.
Well something along that line anyway. If you want to check yourself, I think Alsan explains it to Lucy after he resurrects in the film and book of The Lion, the Witch and the Wardrobe. For the actual original laws, you'll need to read The Magician's Nephew, where Narnia is created.
Deeper Magic
Aslan's Deep Magic was the law that the White Witch did not know in "The Lion, the Witch and the Wardrobe." This ancient magic governed the rules of justice and sacrifice in the land of Narnia, ultimately leading to the Witch's defeat.
To be a witch or not be a witch is up to you. Anybody can become a witch, no one is born a witch. If you have learnt and practice Witchcraft, then you are a witch.
Ask them.
Murphy's Law - 2013 Which Wich Witch 1-4 was released on: USA: 29 July 2013
No one is a witch, so there isn't a way you can tell.
1641
Toybox
I don't know exactally the date, but people were accuesd of and killed for being a witch
I do not know the name of the metal, witch is NONREACTIVE. I know that only noble gases witch are nonreactive.
I doubt my know
The witch that imprisoned Ariel