User blog comment:Ultimate0/Dissidium, the Shadow of Death/@comment-24013185-20131203234014/@comment-15287106-20131205160510

The passive gives 0~30% more damage depending on enemies' life, so it's more of a finisher; The base damage on the W and the 150% bonus AD scaling are quite necessary, since he's an assassin and needs high burst, and he doesn't do much more than that ^^ He's really fragile too, so teamfights aren't his speciality. Just find a target, instakill him, and harass from distance with caster form once in team fights, and finish them with melee form. High damage, high risk :)