Hi, when i play Lonedruid, go bear-form and activate mantastyle, it shows the other two illusions with less than full health bar. I don't know if it was made so on purpose, but it reveals which one is the real one(or so it does on my screen). It does not do it on other illusions like the illusions cape item and i haven't tested it on other heroes, but it definitely happens on Syllabear.