Sovereign Magic - Mastery of the Land is another volume in the Encyclopaedia Arcane series, focusing on the powers of those legendary wizards and sorcerers who overshadow whole tracts of land. Designed for easy integration with any fantasy-based D20 games system, the Encyclopaedia Arcane series does far more than merely introduce new spells or items to extend existing magic-using character classes. Instead, each book covers wholly new forms of magic or details aspects of magic-using characters' lives in extensive detail, adding fresh dimensions to campaigns. Such information is not intended solely for the Games Master to use in association with non-player characters, however. Each book of the Encyclopaedia Arcane gives full details for players themselves to try the new systems presented, along with plenty of information to aid the Games Master in the introduction of each book into his campaign. This volume gives players and Games Masters alike all the information they will need to integrate sovereign magic into their campaign. Full guidelines are given for the establishment of a sovereign mage's dominion and the expansion of territory, as well as a complete list of territory spells, the incantations only available to those who have this magical power of governance. Specific help is also provided for the Games Master, showing how to use these awesomely powerful beings in support of game balance and campaign drama, rather than upsetting it.