[He carefully listened and the more in depth she went into it, pure amazement and excitement was visible on his face. Klarth allowed his brain to wrap around this new enticing information before speaking himself.]

Apatheia. Entelexeia. Aer. You're certainly right that there are terms I don't recognize though mana and summon spirits seem synonymous. There may be some other term that coincides with them as well. It's very fascinating.

To begin, can you elaborate on what exactly an Entelexeia is and what it's purpose was in your world prior to the conversion? And furthermore, how that conversion affected your world as a whole? If what you're claiming is true, then perhaps the spirits I possess have been created in a similar manner.