It's... Hmm.

[Malice considers how to explain it, and then shrugs a bit.]

Okay, say you were to stab me with a knife. [wow??] You'd leave an injury on me, yeah? Well, I could reflect that injury right back at'cha. So you'd have the same stab wound as me. 'Course, mine wouldn't disappear, so it's not like it's perfect or anythin'. I've gotta be pretty close for it to work, though it does also work on magic.