Elder of the Realm
Among the Outlaws #17 (x3)
Ally
[3] 2 1 1 2
Teleri.  

Response: After a treachery is revealed, discard a card from hand (spend 1 to discard the top card of your deck instead). If the first letter of the treachery card's title matches that of the discarded card, cancel the "when revealed" effects of the revealed card. (Limit once per game.)