If he could use primordial treasures, to say nothing of a mere Golden Immortal, even a peak Heavenly Immortal might be easily blasted to oblivion.
Of course, short of a life-or-death crisis, Yun Chen would never take out a primordial treasure.
Seeing Di Yu'er injured and facing a life-or-death crisis, Yun Chen naturally could not sit by and do nothing.
Chapter 375