The End of the World Is Coming: I Survive Until the End by Devouring Metal

Others picked up goddesses through the doomsday picking system, but Gu Ci picked up a broken box that could only swallow iron. Don't talk, don't imitate people, don't let Invincible worry you. Swallowing an iron nail will warn you of a zombie wave. Swallowing a steel plate indicates a way out. When the whole world was eating people and grabbing food, he took the musical girl, the fighting god of war, and the angel in white to build the last city wall of mankind. Until that day, the box lit up with a star map. The end of mankind has just begun!