[From the back of the book.] Great heroes need great foes! The Iron Heroes Bestiary contains more than 30 new monsters designed for use in Monte Cook Presents: Iron Heroes. They fill a variety of roles, from intelligent, thinking foes to brutal, mindless beasts that spread misery and destruction. What they have in common is a mixture of martial and arcane power to challenge the player characters. This book also includes basic advice on using monsters in Iron Heroes, such as new feats and mathematical methods that help you judge whether a creature offers the proper threat to the party, and new villain classes to generate challenging NPCs quickly. Compatible with any game that uses d20-based mechanics.