Within just two hours, thousands of warriors had gathered in Arcadian City, ready to defend against the impending tide of Voltox Zombies. Everyone knew this invasion would be especially dangerous, and the reason was clear. Although many power sources can be used for weapons, Humium was widely regarded as the most powerful of them all.
Its destructive power far surpassed that of any other known mineral. The fact that weapons made from Humium would be less effective against the Voltox Zombies made the situation even more dire. Sure, other weapons could be used, but not all were suitable for a large-scale invasion like this one.