"Those tornado storms are Desolate Storms, formed by the chaotic Heaven and Earth Rules in the North Abyss Misty Plain colliding with each other. Their power varies greatly. If you run into a weaker Desolate Storm, you might still have a chance to escape with your life, but if its power is too great, even experts in the Sword Saint Realm can hardly escape death." The Heavenly Curtain was far too obvious, so Ye Lanfeng couldn't be bothered to explain it, and focused instead on those storms.
So this was a Desolate Storm. Han Yan remembered very clearly that back when Jian Wuchen went to the Beiyuan Fog Origin to treat the meridians in his right arm, he encountered danger in a Desolate Storm and was saved in the end only because her grandmother Luo Shuiyi personally took action. His life was saved, but her grandmother was injured because of it and then disappeared without a trace.
