Humanity’s hope

Like what Tian Zhenxing had said, space agencies around the world discovered a large unknown spacecraft orbiting near Earth a week ago. It had released dozens of giant golden spinning tops made of metal. Those spinning tops were about eight stories tall. They could spin at high speed, creating violent Level-12 tornadoes in their trail. Everywhere those tops went, they destroyed buildings, bridges, forests, and everything else with ease.

It was a global disaster, and countries around the world launched a counterattack immediately. But machine guns and bombardments could not destroy them. America even used its nuclear weapons to blow up these deadly spinning tops and the orbiting mothership. But to the alien race, those nuclear weapons were nothing more than children's toys.