As I have tested, the Black Magic enchantment is an upgrade to the Mongoose enchantment for rogues. It procs frequently every 45 seconds because of it's internal cooldown and helps fend off energy starvation for mutilate rogues. Please update your site to give this enchantment at the very least 12, because 0 is completely incorrect.
oops, silly me, being in my off-spec when i looked. All my other enchants are max rated regardless of spec, it didn't come to mind that it would be different for that, although i do see why that would be the case.