From the introduction: This Source Reference Document (SRD) is an expansion for the Sundered Epoch: d20 RPG System. You need to be familiar with those rules before you can use this book. Publisher's blurb: Build your own nonhuman characters either for player characters or NPCs. User summary: Despite being designated as a "System Source Reference Document", The Magic & Powers SRD provides the game options without any re-use option or license option. Additionally, "SRD" use is restricted by copyright which exclusively prohibits anything except "personal use".