Yu Sui used the Five Elements Light Core to protect Wei Ren, partly to help him escape and partly to observe the state of the Light Core inside him.
The seawater parted, carrying Wei Ren toward the mountains. By chance, he encountered Shen Tianxue and Pei Daiqing, who were leaving the academy.
Yu Sui had heard about these two Agricultural School Saints and their habit of keeping out of worldly affairs. They disliked meddling in other people's business, but at least they wouldn't stab Wei Ren again, so she still held on to a sliver of hope.
Only after hearing Shen Tianxue and Pei Daiqing's conversation did Yu Sui realize she had underestimated just how far their "keeping out of worldly affairs" went.
Shen Tianxue had nearly pinned Wei Ren to the shore with a sickle.
Fortunately, Yu Sui had considered that, given their defiant personalities, they might not be so wary or hostile toward certain things. Besides, when Pei Daiqing drove away the Scorpion Poisonous Insects, she had seen a shadow on the boat.
She could confirm that it was the shadow of the Agricultural School Forbidden Technique, Phantom Beast.
So she deliberately activated the Phantom Beast Shadow inside Wei Ren. After seeing it, Shen Tianxue finally reacted differently and changed her mind, deciding to fish Wei Ren out.
Through the Five Elements Light Core, Yu Sui watched Pei Daiqing lift Wei Ren onto the bamboo raft, check his injuries, and press herbs from his basket onto his wounds. He then took some more, squeezed out the juice, and made him drink it.
If Wei Ren relied only on the Five Elements Qi provided by the Light Core, it would merely prolong the time until his death. Yu Sui couldn't leave to find him, either. Even if she wanted