We have a little clue, the spoiler image cards of Celebrimbor' Secret:
You can see two words: ...., return a .... your hand.
What text do you think it could write?
My vote is:
Response: After Orophin leaves play, return a
card from your discard pile to your hand.
Edited by Mndela, 31 August 2014 - 04:51 AM.