"What is the Heaven-Severing Technique?"
"It is a type of secret art that prevents the tracing of connections. It isolates oneself from heavenly secrets and severs karma, eliminating the very possibility of connection tracing. Thus, once you've applied the Heaven-Severing Technique, whether it's refined blood or anything else, you won't have to worry about it being used against you."
"I didn't know such a secret art existed."
"Its use is limited, so it's difficult to popularize. Of course, the high difficulty of the secret art is another reason."
Using karma as a medium to trace connections, and going further to employ all sorts of tricks, is not as simple as it sounds. Among such secret arts, none are not extremely arcane, and even if you master them with great effort, you can't use them recklessly.
This is because connection tracing often comes with enormous risks that are sometimes too heavy to bear. If the target of the trace has a much higher cultivation level than the tracer, or possesses various means to prevent tracing, there's a high chance of a backlash.
And while you might know the target's level in advance, it's hard to know if they have means to block tracing, so connection tracing is never something to be taken lightly. Jaekyung knew this, but he had always been cautious.