From publisher blurb:
Baron's Lost Apocrypha contains a bevy of Spheres of Might and Power content that didn't quite fit into other major Spheres releases, those secrets that were once lost now compiled and freed from their vault!
This lost content includes a variety of Archetypes, Magic Talents, Combat Talents, Feats, Spheres Options for monster creation, and a brand new system for Dual-Sphere Drawbacks!
Included in this book are:
Archetypes With the champion alchemist archetpe you can combine both spheres of might and spheres of power talents to customize the alchemist the best fits what you want to play!
Magic Talents Sixteen new basic talents and nine new advanced talents!
Combat Talents Eight new basic talents and six new legendayr talents!
Casting Traditions Grant your powers to another creature using the Benefactor drawback, or further customize your magic spheres with one of twenty-nine new Dual-Sphere Drawbacks!
Feats Twenty-seven new feats that include options for both users of magic and might!
Bestiary Utilize new spheres-based options for the Talented Monster system and the Unchained Simple Monster Creation rules, or wield the might of spheres-based variannt Graveknights and Liches!