Thirty new Sorcerous Orders. Thirty-six new Sorcerous Lorebooks. Rules for creating new Sorcerous Orders and Lore Rules of Orders and Chapterhouses. Blood magick, magickal foci, and sympathetic magick. Animated Dead, Ghosts, and Spirits.
This is one of my favourite role-playing sourcebooks of all. I wore out the binding reading it when I was a young man. One of the things that I like in role-playing is magic, wizards and conspiracy, and this book has it in spades (or hearts, or whatever). This book enhanced my favorite part of a game that I greatly enjoy.