Lord of All: the Only Black Iron Castle at the Beginning

In the parallel universe, tens of billions of humans descended on the void battlefield and became the masters of the castle. This phenomenon began to appear thousands of years ago. But here Han Guang came to this world differently. Every human cub gets a special gift, a castle. In this world, castles have been mostly developed. There are tens of thousands of castles including summoning, cultivation, viewing, attack, defense, medical, etc. The forbidden lost castle in the human university is the most terrifying. However, Han Guang, as a top student in Modi Middle School, did obtain the only black iron-level castle among humans. "I am the top offensive castle. I can study Italian artillery. Girl, look here." "I am a medical talent castle, please form a team to play a dungeon!" Looking at these words, Han Guang entered a new world in confusion. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.