How about a feat for DnD Next?
Among The Fey
Either you were stolen by the Fey or you live among them for a time, but you have mastered their tricks
Benefits: Gain the following
- You gain a +2 on all saving throws and AC against effects and spells from the Fey
- Gain training in Nature or gain a +2 to Nature
- Your physical attacks count as cold iron for bypassing resistance from fey