Angband Spy
The Betrayal of Mîm#175 (x4)
(35) 3 3 3 4
Forced: After an ally is played from hand, either add 1 encounter card to the staging area of a random non-unique location or raise each player's threat by 1.

...and ere long Amon Rûdh was surrounded by spies, lurking unobserved in the wilderness...
-The Children of Húrin