From publisher blurb: Add to your OSR game with some or all of these additional features: Racial Class variants 2 New (yet familiar) races 2 New Classes Rules for types of followers Rules for simplified Mass Combat New Spells Plus a lot more... Basic Arcana is designed to give players and referees some ideas on how to expand their OSR games with options that will seem familiar, and will be compatible with the older versions of the world’s most popular fantasy adventure game.