Mana Pool

While not everyone directly uses it, the pool of mana we can all use is understandably a rather important part of how one uses magic. We know little of the Atronach system that gives the mana pool meaning, but we do know that due to the system, the mana pool is profoundly important, and even though there are variants, they all obey the same rules.

— Chun Li, Peacock Empress

  The Mana Pool is the pool of processed Mana that is usable by a being. It plays a role conjoined with Magical Auras that allows a being to draw in ambient mana, process it into a form usable by them and thusly use it to wield magical abilities. In many ways, it's a core component of magical expression across Atronach, allowing spells and abilities to function.

A Variable Resource

The maximum size of an individual's mana pool depends on a lot of different factors, but they can be summarised to be to do with that individual's development as a magic user; the more skilled and powerful an individual gets at using magic, the larger their mana pool becomes. The pool naturally replenishes itself over time through the processes referenced in the Mana document known as mana attunement.
  A key distinction here is that all kinds of mana do feature a mana pool, but only arcane mana requires the mana attunement process; for simplicity, the Atronach system refers to all three pools as a single conjoined mana pool, and reflects the properties of the mana types through spell costs and qualities - generally, for example, divine spells and abilities are very cheap compared to arcane ones, but have a more drawn out casting process.