Gamemastery Guide Gamemastery Guide is a core supplement for the epic fantasy Pathfinder Second Edition, written by Logan Bonner and Mark Seifter and published by Paizo. By Aaron T. Huss Learn more about Gamemastery Guide here Purchase Gamemastery Guide here (paid link) Find other Pathfinder Second Edition posts here Gamemastery Guide is one of the staple core supplements for Pathfinder, and Second...