After Raven 12345 explained the Scarred Nebula to Hao Ren, they remained in space, gazing at the magnificent "scar" in the nebula for some time. If he had not seen it in person, Hao Ren would never have been able to imagine what kind of phenomenon the Wall of Reality's collapse would produce. All his previous discussions with the MDT about the Wall of Reality were mostly postulations that visualized doomsdays scenarios like heaven and earth collapsing, the sky turning upside down, and things like that. In reality, the destruction from the collision of two universes was far from simple.
A galaxy, the size of the Milky Way had been deleted like wiping data on a hard drive. It became background radiation in the universe and left a 7.7-lightyear-wide twisted nebula behind.
It was the so-called "mathematical rate of disaster". In the face of such a disaster, even "disaster" itself would be wiped off.