The Fall of a Sun.
Emperor Heavenmind...
A mad cultivator who went on a rampage in the Azure Tree and refined numerous worlds, both major and minor ones, into pills.
That was simply all every person who knew his name could say about him. No one knew how he looked, what his voice sounded like, or even his cultivation level - a complete mystery.
It wasn't a case that no one could comprehend his cultivation level nor was he hiding it, rather everyone who had the chance to comprehend it didn't live to spread the information.
"So, you're the mad cultivator who is one of the rulers in the Golden Crown?" Yang Wei asked.
Emperor Heavenmind chuckled a bit. "Ehhh, not really. That's just a rumor, but that doesn't mean I'm not from the Azure Tree."
As expected from a Catalyst World, of course he'd originate from there... Yang Wei figured.