I think it's more pertaining to the dream scene with Old Maggoty and we all assume it's about healing since trolls heal with plants since they have no magic. The Palace opens up elves to different gifts, etc. But elf healers don't work with a lot of plants, do they? Not since like Rain. They do the hands-on healing. That's what's throwing me off. Maybe the healers lose their healing gifts in some way and have to learn plant lore or something lol. I don't know.