... Still not sure why paralyze is in illusion though, unless it's "paralyze with fear" or something.
That's the way I view it. Like an illusory mind control spell, it convinces the victim that they are powerless to control their limbs. I suppose there could be other views, but partly because it is considered an illusion spell, I like this one.
I suppose if it were not illusion, it would go into the 'gee, I'm not sure' box called mysticism. Lol.