Publisher's blurb: In the world of Crystal Heart, people's hearts are literally made of stone. Agents of the mysterious organization Syn scour the world in search of Crystals, powerful relics of a bygone age. Syn Agents replace their hearts with these Crystals, which grant incredible powers... but also affect the bearer’s personality in unpredictable ways. ... [The] Player's Guide...includes only the first few chapters of the book (those that don't have any secret stuff), to share with the group.