As the path of sublimation gradually becomes less pure.
The path of corruption also gained an "infamous" reputation.
Though nowadays, the corrupted have more high-tech methods of transformation—implanting shards of "appendages" within the body and entering nightmares of any difficulty. As long as they can come out of the nightmare, they can be directed to transform into the corrupted with specialized abilities.
All the "students" taught by Nicholas II, including Kafney, are such corrupted individuals.
But actually, the corrupted can also naturally transform—or to say, the initial corrupted were all naturally transformed.
As long as at the bronze level, they change their first desire into something "within reach," "exciting," and "easy to satisfy"—such as making a lot of money, taking someone attractive by force, killing someone they hate...