From Introduction:
In this sourcebook, we have revised, corrected and added many things. Some are found in The Legend of the Steel General, some are brand new for you to use in our forthcoming adventure, The Twenty Sides of the Evil, the second long-awaited chapter in the Seven Avengers Saga.
You will find new feats, new skills and spells, several races, two prestige classes, a new class and an explanation of how magic works. Furthermore, the regions of the western kingdom are described in more detail.