We were all shocked to see this lich since not a single one of us had expected this undead horde to be led by a lich.
An undead horde that was on its own was completely different from an undead horde that was controlled by a lich after all.
An undead horde that had a lich at its helm was not a headless chicken, it was a dangerous force that they had to be careful around. Just like how the undead had formed that hand and had tried to grab at the wyverns earlier.
With the lich holding the fort in this undead horde, it was unknown what kind of things they could do.
It was really different when the undead horde had a brain controlling them.
The lich was a S Ranked Monster that was on the same level as the wyvern, but the danger that liches presented was more at the SS Rank. A single SS Rank would be enough to destroy smaller kingdoms.