Ye Dafu hit Green Wood with his staff, and the whole world suddenly turned black and white briefly. Then, in a very short period, Green Wood's eternal body experienced birth and death millions of times to test the validity of his claim to be eternal. He resisted, as his white bark skin released an intense light to fight the power of Samsara, which was rapidly destroying him on a conceptual level. He failed.
Only Everlasting Empyreans who have mastered their [True Self] can boldly proclaim to have escaped the shackles of death or Samsara, and even then, that's a wild claim that no one will make lightly. In the Chaos Universe's hierarchical structure, the Eternal Wood Qi can only be described on the lower tier of the path of eternity.
Crack!