Mana (also referred to as pneuma, atar, jiva or hekau) is the fluid form of the Materia Prima, otherwise called Prime, Supernal energy filtered down into the Fallen World. Some of it is residual energy left trapped when the Abyss formed, recycled over the millennia into a thousand forms, but some of it is fresh, brought into the world by a mysterious form of grace from on high. In a Hallow, it can also be crystallized into a material form called Tass.