Gibeele defining magic was the definition of a structure within reality without influence beyond the sustenance of the Drift King. Unless you are contesting this definition, it is something that is free to occur without further fanfare; if you are contesting it, then I suspect its creation would require the use of a generic Act, as is the case with the creation of ecosystems within Regions when they are contested.
Your attempt to define my self as having lips is an attempt to define something above reality - my self - as well as something that belongs to a different god - me. As you are essentially attempting to entirely redefine me in a manner that I disapprove of, I am capable of contesting this attempt, and as it is my self you are attempting to alter, my power over my self is - as I have previously explained - full, and I can freely disregard this foreign attempt at defining me. Unless, of course, your attempt to alter me is an attack - in which case I would have to defend myself, and would do so to the greatest extent necessary.
Finally, your attempt to define followers as existing runs into a twofold issue. First, mortals that may conduct worship do not, as yet, exist, nor have we progressed into an era where the workings of reality are suitable for their creation. Although I could potentially see justification that any Outsiders affiliated with you may be your followers, they cannot produce any meaningful religion, and as such they are irrelevant to the greater workings of reality and what lies above it. Second, religions, worship, and sacrifice are things that carry weight in reality, and cannot be implicitly constructed the way you constructed the bird; there is a cost associated with their foundation. A generic Act at minimum, in fact, for a minor ritual, or a sphere Act for a major one.
Implicit construction works only when it is both unopposed and without bearing on reality's workings, or where otherwise noted, such as the construction of Regions' ecosystems.