So to build on the evil eye mechanics, looks like it indeed does require the user to glare at the target for the curse to progress, which is good, otherwise it would be too OP of a skill, considering it can reduce HP to 0. Another thing that's really balancing it is the fact that if you use it on a target and it runs away, you're out of a skill and mana until you either find and kill it or it dies on it's own. Pulling aggro is also a balancing factor, otherwise it could have been used for assassinations.