@Malte It was said that the drawback grows greater the stronger he gets or something. Before there was nothing, now he see's another's trauma. Maybe later, he will be put in their place in their trauma or something else, who knows.
@NightedgeZero well he died first at the start and the healing hero was able to defeat the others and has the weapon too. I would say its normal to think he will be a challenge, but not an unbeatable one. Of course, the king might buff him, but we got like no hint to there's no reason to speculate.