The Shapeshifters Manual details all the rules needed to shapeshift into an immortal's true form for the role playing game Immortal The Invisible War 1st Edition. From the back cover: "Within every immortal heart is chained an ancient beast, a feral passion that struggles eternally within its bonds, snarling for release... Behind every eye there lurks a natural power unknown to mortal technology and the ways of science... This is Himsati. The form that injures. A curse that reaches back to the dawn of time and howls in every legend, every myth, every dark fable. Vampires, Lycanthorpes, shapeshifters of every kind. Herein their secrets (and yours) are revealed."