Everyone's Castle: Start with Slime but I Can Sign In

Castle era for all! Billions of people traveled together to the legendary continent! There are various types of troops here, Various abilities! Various castles! But Ye Feng's troop level is the lowest! Black iron! But Ye Feng ushered in the sign-in system, Ye Feng's castle is also the darkest! What's black? Black heart! Even though Ye Feng's castle has been upgraded to King One, Others also call him the Lord of Black Iron City! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.