I haven't levelled Ninja yet, so I had to read that several times to understand it. I think it's trying to sound cool, as if you created a doppelganger behind the target and your enmity is going there, but mechanically that's not happening at all, so I'm surprised it's worded so nonsensically. Even in the roleplay sense, how does diverting enmity to a doppelganger put the enmity on the target? Is the RP idea that you cast illusory magic on your target to look just like you? In any case, I love flavorful, roleplay skill descriptions alongside skill information, but I have to agree this goes too far.