My Model Was Actually Used as a Trump Card to Destroy the World by a Foreign Race

[The end of the world is coming + system + survival + model come true + hot-blooded rescue + brother-sister bond] On the day the star fell, the alien Abyss tribe invaded, the world fell, and human civilization was on the verge of collapse. In the ruins, I accidentally activated the God Craftsman System - the mecha model I made by myself can be enlarged into reality, controlled remotely, and fight alone. From then on, I transformed into the ghost pilot "Star Caster", hunted aliens in the dark, and rescued countless survivors, becoming an urban legend among the military. But just when I reached a secret cooperation with the military, a more cruel truth surfaced - my sister was actually transformed by the Yuan tribe into the key "humanoid interface" to close the wormhole.