He accepts the bottle back, taking a sip and held it in his mouth, savoring the flavor before swallowing. No, not the right strength yet, but it will come in time. He hands Wei Wuxian the flagon of beer in exchange and looked up though he wasn't seeing his surroundings.

"There is a tale I've heard among travelers about a serpent that grew so large that it could encircle the world. An unruly thing, it would fight all that came near it until a god tricked it to bite it's own tail. If it let goes of it's tail, it would destroy everything, but because it refuses to let go, it remains contained and at peace."

Looking at the youth at his side, he adds, "Yin energy drifts and float. Yin metal is always hungry. If there is a way to make the Yin to attack itself forever, it would be easy to contain. The trick is finding a way to balance the forces so it will always be forever a loop just like that serpent of tales."