[Before they head up, Xingchen reaches out toward a wall, pressing his palm against it.]

No...nothing feels like anything I know, but there is definitely some force at play. I just can't put my finger on it.

[No qi, no spells, no specific presence he can point to and say, yes, this lighthouse is haunted by it in particular.]

This world does operate by its own rules, though. It is possible there are beings we don't recognize that are prevalent here.