Mana is a principle force of Tyra Kolaq'blegae; it is the basis for life. It fuels it and sustains it. Without mana, life is abbreviated and weakened. Mana is also the substance magic requires. Magic uses mana as 'modeling' for the ideas that exist in the caster's mind. Thus mana is mutable; will can act on it causing it to solidify and form other things.
Mana exists in varying quantities throughout Tyra Kolaq'blegae. In the beginning of Tyra Kolaq'blegae the first planets orbited around the Mana Sun that emanated pure mana. One day the Mana Sun exploded, throwing the planets across the space that was Tyra Kolaq'blegae. Mana spread unevenly around, and the hard shell of the Mana Sun split up and scattered across the universe as Mana Shards. Mana Shards continue to emanate mana without end. They are also the seeds of Mana Trees, which produce mana.