Earthen Vessel

Those who study the fortifying magics of earth and the fundamental theory of magic offered by spirit eventually learn to transfer power between the spheres. This takes the form of the earthen vessel spell, which allows a mage to limit her own mana so as to wrap herself in the protective powers of the earth. While so shielded, she will take nearly no damage from any source until the energy is spent, after which she may be hurt normally. Even when the protection of the earth's spirit is exhausted, however, she will not recover her lost mana until the natural expiration of the working.

Drawing upon her deep understanding of the Stones of Power, such a mage may use the Stones to further enhance this spell. Each Stone in her inventory will increase the effects and decrease the mana limitation, though more than three Stones offers no additional benefit. While this working is of limited utility by itself, when enhanced by the Stones it can be quite formidable indeed. Note that the Stones are merely tapped -- not consumed -- by this spell.