ff88aa88_Magic_System_Generator__r_to_alter_reality____but_why_
[Where Magic Comes From] Magic and Technology [God(s)] One-way interference
Magic makes technological devices mysteriously break, or the presence of any complex technology suppresses magic -- but not both. A mage is unlikely to also be a user of much technology.
Magic System Generator
One or more powerful supernatural beings outside the universe grant certain people a part of their power to alter reality... but why?