Looks like the Northern Plains is making moves on the, "Force behind Giant Sun's Blessed Lands downfall". Then again it might be from that secret force that FY had a run in with earlier in the novel (the one that Bai Ning Bing joined).
"Today, you will taste the fury of the Winged Crane Flying Immortal!"
Sounds like something an old man hoaxing others would scream in a confrontation *o*