Sorry to butt in, but does anyone know of terrestrials that would work for this? I've wanted to have a small jewel or similar growing in moss, but can't find one that wouldn't freak out about the wet, heat, or both
The various tropical jewel orchids might work quite well... they like high humidity and warmth. However, they also tend to need deep shade, which may be difficult to achieve in a terrarium where you're growing under lights that are needed for the epiphytic orchids.