Two possibilities, neither of which are particularly optimistic for that young man!
He is at the Yuan Dan First Realm, surpassing the other by two major levels of cultivation—that would mean a capability equivalent to the Broken Realm. However, judging from the light laughter coming from the other, the person in question must not be very old, which means it's likely the second possibility: the other is also a Mystic Realm Master, and furthermore, a master with a higher level of achievement than him!
Sure enough, one garbed in snow-white, and the other draped in dark red, two figures suddenly stood in mid-air. When the lad saw that both hands of the figure in white also produced two rays of Jin Guang, his expression instantly darkened. Being a Mystic Realm Master himself, he naturally understood that it was Mysterious Gold used for etching the forbidden gold lines.
What happened next, however, left the youth completely dumbstruck.
