Cutting weeds without removing the roots would certainly leave troubles, and the expression in Fen Juechen’s eyes caused Yun Che to feel incomparably certain that sparing his life today, would be much much more dangerous than even leaving Fen Yijue alive! What would be left, would perhaps be unpredictable future troubles.
However, since he had already promised Xiao Lingxi to spare Fen Juechen, he would absolutely not kill Fen Juechen. Moreover, from what Xiao Lingxi had said, if not for Fen Juechen getting in the way several times, Xiao Lingxi might have ended her own life because of Fen Juecheng, before he’d even reached Burning Heaven Clan.
This, was also enough to become the reason for him to spare Fen Juechen’s life.
As for the possible consequences, he was willing to completely shoulder them!