Eleven original feats including the new eldritch type, which grant specific magical abilities to enhance your spells in ways that metamagic feats can’t
Three new prestige classes: the embermage (the supreme fire mage), the graven one (who covers his entire body in magical tattoos), and the mirror master (specializing in unique mirror magic abilities and spells).
More than 60 new spells of all levels that you can add to any campaign.
A like number of magic items of all types, from weapons to wondrous items (and artifacts!). This section introduces the brand-new concepts of magic poisons and magic vehicles such as the wheeled war altar and the diving sphere.
Last but not least, The Book of Eldritch Might presents a new monster template, the magical construct, which allows any spellcaster to create golemlike guardians and servants based on existing monsters.
This book was updated to version 3.5 of d20 system and combined with Book of Eldritch Might II: Songs and Souls of Power, and Book of Eldritch Might III: The Nexus to be published as The Complete Book of Eldritch Might in 2006.