To be not just ruled by emotions, but physically changed by them? Better to have no emotions at all.
— Mordenkainen
The fey eladrin were the most powerful of the eladrin, a subrace of elves who adopted the Feywild as their home.
After centuries of exposure to that plane's magic, they acquired supernatural abilities not seen on most of their kin from the Prime Material plane and were effectively transformed into fey.
Sometimes called noble eladrin, they were capable of changing their physical appearance and powers according to their mood, assuming characteristics of the seasons.