"Cold Marrow Sutra": Shen Yan's practice of ice-based skills was always counterattacked by the cold air, but he discovered in the cold pool that he could absorb the cold air to refine his body. He pretended that it was difficult to practice, and secretly let the cold air condense into ice bones in his body. During the sect competition, his opponent's fire spell hit him. He caught it with his bare hands, and the cold air instantly froze the opponent's whole body.
