As a side note, the traditional Roman Inquisition definitions of "White" versus "Black" magic (Sorcery vs. Witchcraft in some sources) was whether you were using natural processes (White) or compelling/contracting with spirits (Black) to perform the effect. So, using astrological connections, synecdoche, herbalism, potions, or alchemical processes were all white, while casting a spell, a curse, or a hex by invoking either God, the saints, and angels, or nature spirits, or pagan deities, or demonic forces would all be considered black.
I don't know if this will help or muddy the waters further.