the user can create black energy that corrupts, be it magic, mind or body the user can corrupt all of them, when something is corrupted it will change to the opposite nature, like fire magic flames turning colder
the corruption of course doesn't last forever and doesn't instantly corrupt stuff, the speed of corruption scales with the magic power and the strength of the stuff corrupted
if its corrupting flames, hotter flames will corrupt slower than regular flames, both will become cold with different amounts of magic
the same for the mind, magic and body of people:
if they are strong-willed they will resist mind corrupting better
if they are strong magically they will resist magic corruption better
if they are strong physically they will resist body corruption better
the user can also control the aspect of the corruption, for exemple the body can be corrupted to be weak but it can also be corrupted to not respond to the brain (the nerve system), one will be harder to corrupt than the other and will cost more energy
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I like it, pretty simple
how is it? what do you think?
C ya later