Anima

Magical Essence Basics
Anima is what every creature needs to cast spells. Without Anima (Or AN for short) magic would not work.

How to get more Anima
The basic way to get a higher maximum AN is by learning and casting spells. When ever you learn a magical spell by unlocking a spec, discovering a scroll, or by being taught you will gain more maximum AN. You gain more the harder the spell is. To the DM's decision once you have cast the same spell enough times (or maybe by getting a few Nat 20s) you will gain Anima. The amount of Anima gained is determined by the spell and/or by the DM.
 * Anima Novice: +1 AN
 * Beginner: +2 AN
 * Proficent:  +3 AN
 * Specialist: +4 AN
 * Anima Master:  +5 AN

A more advanced way of gaining AN is by practicing. You can practice your Arcane arts while camped. Certain specs will help with controlling your magic while practicing and to help you gain AN faster.