A quick revision that hopefully addresses some of the points raised. Thanks again for the feedback and I appreciate any comments on this revised version.
Instrument of the Archangel Phanuel [-4]
Description: The character has been chosen by the Archangel Phanuel to act as its instrument on Earth.
Sponsor: Phanuel is the fourth archangel, after Michael, Raphael, and Gabriel. Phanuel is the face of God and an angel of repentance, hope, and exorcism. He is a protector of mortals against demons.
Agenda: Phanuel is the leader of the Ophanim and thus charged with the protection of God’s throne in heaven. Since it is also the protector of mortals against demons and the angel of exorcism, however, when the need is great, it will choose an instrument, a mortal, to grant a small portion of his power. This instrument is trusted to carry out the work of Phanuel on Earth.
Evocation: Evocation powered by Phanuel is a blazing blue spiritual light. Because they are powered by angelic magic, such evocations wielded by a mortal practitioner cannot have a direct effect on a mortal or on the physical world. The effects of the instrument’s power are invisible to non-supernatural beings. Only creatures without free will such as demons, spirits, Red Court and Black Court vampires, fairies, etc. are affected. Spirit magic is the only element to which Phanuel grants access. Against supernatural foes, the full range of evocation effects that are in line with the intent of Phanuel and can be powered by Spirit magic are available.
Thaumaturgy: Rituals powered by the holy power of the Archangel Phanuel still cannot negatively affect pure mortals or other beings with free will, however, Divination related to such targets is allowed. Phanuel’s power can naturally be used for exorcism, but can never be used for summoning a demon or spirit or binding it to the will of the instrument. Conjuration is outside the province of Phanuel’s granted abilities. Veils, wards, and rituals related to transformation and disruption can be cast but only affect supernatural entities. Phanuel’s magic does allow transportation and worldwalking by the instrument to give access to places where they are needed.
Evothaum: Any exorcism ritual may be cast with the speed and methods of Evocation.
Extra Benefits: Magic granted by the Archangel Phanuel is particularly potent against demons. For creatures vulnerable to “holy” magic, Phanuel’s magic may satisfy the Catch and it always does so against demons.