From the introduction: This document provides playtest options for the druid, the fighter, and the wizard. ... At 2nd level, a druid gains the Druid Circle feature. Here is a playtest option for that feature: the Circle of Spores. ... At 3rd level, a fighter gains the Martial Archetype feature. Here is a playtest option for that feature: the Brute. ... At 2nd level, a wizard gains the Arcane Tradition feature. Here is a playtest option for that feature: the School of Invention.