Alex noticed Hurt's frustrated expression.
Void talents were the rarest of all. You can mould the space around yourself and can attack going beyond the physical barrier by distorting the space around the object.
For example, someone threw an insanely large fireball the size of a planet at you and to destroy it, you can just form a black hole in the middle which would suck everything it thought you couldn't achieve this kind of feat even at overlord rank
Even though it can allow the user to attack transversing the space, there was still a flaw in it. One cannot mould the laws of space if the object was living or made up of organic material.
So, in a way, the Lich used the undead as the meat shield restricting Hurt from directly attacking the Lich.
