Dark Magic and How to Use It was a presumable guide to using dark magic. It was once given to Zamorak's apprentice, from Zamorak himself, to help him better understand the art of chaos and destruction. It is shown that his apprentice was deeply engaged in it, probably meaning that it was very interesting.
Zamorak's copy was tiny and black, with the title emblazoned on the front cover. Its pages were crinkled, hinting that it may be quite old.
- Aidan Knight: The Edicts of Guthix (First appearance)