[Lan Xichen is already at the edge of the lake in moments, the water up over the bottom of his boots as he extends his hand to Jiang Cheng. If he didn't mean to end up in the lake (which should definitely have been obvious from the start) then he must be in need of help. Once he is sure that the other sect leader is safely on the bank, he removes his outer robe and offers it over.]

I am afraid that is difficult to be sure of at the moment. There are mirrors in this city that bring people from many different lands, but I have never heard of people appearing through the water. There must be something wrong. Please, take this. You should at least remove your wet clothes.

[He should have practiced more spells. Something to draw water out of objects or a warm wind, perhaps. But without those skills, he's stuck doing things the normal way.]

You should go inside and dry off where it is warmer. I suppose we should just be grateful you are a strong swimmer.