After considering his options for a while, Zack made his choice: he would attack the new area of the city. His main goal remained unchanged—to destroy all the monsters and prevent them from reaching Earth. To achieve this, he needed to strike at the core of the problem. This meant targeting the monsters or monsters that possessed the crucial crystal or crystals that granted them the chance to launch their invasion.
Zack knew that eliminating the source of the monsters' power would deal a significant blow to their ability to cross over into his world. The massive wall he had encountered likely shielded the heart of the city's operations, where the crystals were probably housed. If he could breach this area and get the crystals, it would cripple the monsters' efforts and safeguard Earth from further incursions.
