Mana is the main source of energy required to perform magic and the use of special abilities or some racial trait powers. It is everywhere in the world, acting like the air itself, some people even replenish mana within their body without having to rely on the air or the land to supply them. Mana is the purest type of energy, it does not cause Re-bound when casting a spell as long as the user’s skill suffice the rank of the spell they intended to use.
Mana is similar to air in a way that is is invisible to the eyes but it is around us like the air.
The overconsumption of mana to the point that there is no mana left in the body or very minimum mana left is called Over-Exhaust. This is a very dangerous condition to be in as there’s a very high chance to lose your life, this condition will only affect people who has been using mana to the point that their body is used to the manipulation of mana while normal civilians who never use mana in their lives will merely suffer headache or nausea.