The guy is obviously testing Shi-woon, you know. Remember when he said in one of the chapters of the breaker that as long as shiwoon doesn't changes the way he is, he will always consider him as his student. And we all know that, this guy basically destroyed his ki centre to protect him not harm him and knew that Kansung will take care of his wounds. But now that he is back again in the murim world, alive and kicking, and with all that sosul coming back and taking the command over sunwoo clan, alex and that blood sucking medicine guy, the revival test on 9 arts' GF and all, it's no rocket science where this thing is going. The team breaker is coming back.
One showdown in the prequel seperated them, this showdown will reunite them and the next will be BAAM!! Believe it...