Omen's goal was initially to possess and corrupt the soul of Jago and transform him into a mindless follower of Gargos. However, he failed to do this and was forced to retreat. It is unknown how long he had been dwelling within and how long Jago had been struggling against his influence.
Now freed, the Herald of Gargos has drawn enough power through his battles as Shadow Jago to manifest physically on the mortal plane. He is corruption, fear, and rage given form. He is the right hand of his masterís will. He is the sign of the darkness to come. He is shadow energy incarnate. He is Omen!