it was an enchant, not an illusion. you can find a million threads complaining about people who were 2.2+ at the time, and even have the enchant in their bags, but cant get the illusion. the reasoning is that duelist, although below 2.2 during one of the seasons, was the next best thing to being able to track ratings from that time. therefore if you have duelist from s14 or 15 you get the illusion, which is just a nod to the enchant.