Xingchen's faith. Xue Yang feels it wash away at his jealousy, take the edge off just enough to allow him to still breath, despite the obvious joy Xingchen feels just at having Song Zichen around again.

But that man hates him- rightfully so, but it might make it difficult for Xingchen. Which means he has to try and get on Zichen's good side.

He meets Zichen's gaze seriously. "I'm not saying they don't. I have done terrible things to both of you, and many others. I can't change that, Daozhang Song. I can only change what I do here."

His gaze drops before moving to Xingchen, though his words are still mostly for Zichen.

"I give myself to Xingchen." He will say it as many times as he needs to. He flicks his eyes back to Zichen and tilts his head, almost a challenge, almost a question. "Shall I disarm myself for you too, Daozhang?"