The Iron Law of Promises: Starting with a Ghost Wife's Forced Marriage

"Any promise you make to someone will become an iron law after their death!" The world grows increasingly insane: the Pope is possessed by an evil spirit, a giant beast graveyard appears in the East, and ghosts roam the cities. Lu Jue never expected that his promises would become the only iron law, heavier than life and death. A promise made in kindergarten gave him a ghost wife with infinitely evolving combat power. A promise in middle school gave him a ghost king brother who can destroy the world. A promise in high school led to him being forcibly crowned as king by the ghosts. Step by step, Lu Jue, who was initially forced into marriage by his ghost wife, has unknowingly risen above the gods. The world has become a bizarre playground, and I am the only iron law.