As he was stuck in the hurricane of cold icy death, Jin was gathering his chi and magic within his body, fusing them together so that he could output Maqi.
Oddly enough, the gathering of his Maqi has the side effect of warming himself up for this fight. He did not feel as cold as before and therefore was able to think rationally. (The cold doesn't bother him anyways~!)
He felt that despite knowing the Serpent and Genbu being one entity, it made Jin feel like he was fighting against two monstrosities. Although Jin was swirling around in that blasted hurricane of icy doom, the serpent did not hesitate to strike the Astral Panda Cultivator and it was quite accurate in its attack.
But Jin did block or evade the attack. Instead, he did the most predictable move in every anime and movie. By pushing himself through into the serpent's mouth. While as iconic as the move would be, he was also to evade the serpent's fangs which seemed to be coated with poison.
