The more Jerico talked, the more Ashton realised a full-scale invasion wasn't something he could have handled on his own. Unfortunately, he wasn't sure if anyone on the planet could do such a thing.
The undead's plan was well thought out. They had considered the smallest of inconveniences. On top of that, Jerico didn't even know the full extent of their plans as he was merely the leader of a brigade thus he only knew what he should be concerned with.
Also, the undead already had more than thirty thousand soldiers hidden away in Lycania. All of whom were already in action. No one had any idea how they managed to accomplish something like that.
After all, it was a very difficult task to fool a werewolf's nose. Yet, they managed to do it so effortlessly. Ashton wanted to know more about it, but unfortunately, Jerico wasn't important enough to know all the details.