God-Level Shelter Starts from the Coffin

All the heavens and worlds were eroded by the world of sanctuary, and all intelligent creatures were forced to come to this world. Each intelligent creature will randomly select a shelter when it arrives as the foundation for survival. Inside the shelter is hope for survival, but outside the shelter is endless darkness. And in the soul-gnawing darkness, danger and opportunity coexist, Weird, undead, demon, Tao soldiers, pets, legions, Runes, weapons, buildings, Magic, immortal martial arts, gods... If you want, you can even upgrade your shelter into a world! Mu Liang, who has always been lucky, never figured it out. Why are the initial shelters selected by others either villas or courtyard houses, or at worst, iron containers with windows? And his own is actually a big coffin! Where are the windows you promised? Where is the promised toilet? In case of danger, should I be asked to run away carrying the coffin? Huh? It doesn't seem impossible.