Rivendell Skirmishers
Angmar Awakened Campaign Expansion #192 (x1)
Ally
Boon
[3] 2 2 3 3

Response: After Rivendell Skirmishers exhausts to defend an attack from a non-unique enemy, discard each shadow card from that enemy.

It was said that Angmar was for a time subdued by the Elvenfolk coming from Lindon and from Rivendell.
–The Lord of the Rings