National Tower Defense Game: Others Build Towers and I Demolish Them

Traveling across the world in a tower defense world, everyone is busy building towers to defend against monsters. The system prompted that the first kill reward was doubled, but I accidentally discovered a hidden mission on the World of Warcraft. After accepting the mission, my system suddenly mutated into anti-tower defense mode. Looking at the defense towers that others had worked so hard to build, I silently raised the hammer in my hand. "Destroying towers seems to make more money than killing monsters..."