Black magic traditionally has been referred to as the use of supernatural powers or magic for evil and selfish purposes. So I would say what you are doing isn’t considered “Black magic”, as your intentions are good. I had talked with Dream one time about this and he said the “Shielding” tag and like @Philip_Weiss said the “Exorcism” field are good for this purpose. I had my dragon use a couple of energies to make my aura and subconscious automatically reject any spells and send it back to the spell caster. I also had it make my aura automatically transmute negative energies from other people into feelings of positivity and bliss. It works for me, and it works great! Lol. Also, the crystal Larvikite is good for cancelling/deflecting spells aimed at you.
