Powers granted through some outside Entity (such as a deity) are called miraculous powers. To use these powers, the character must presumably be on good terms with this Entity. Miraculous powers are priced as Supernatural, even though the effects are frequently Fantastic.
These powers may take the form of SFX, and thus work much like spell magic or the power may take the form of a situationally specific prayer, and thus work like meta-magic.
Miraculous Powers are not magic, however. They have normal (fixed) parameters, and do not require mana to be present.
Such powers often come with restrictions on behavior on the part of the user and/or a requirement that the powers only be used in direct service of the Entity. Hence the discount.