Orcish Howls
Escape from Khazad-dûm #44 (x1)
Perfidia
25

When Revealed: Exhaust X characters, where X is the number of Uruk enemies in play. If there are no Uruk enemies in play, Orcish Howls gains surge.

Shadow: Attacking enemy gets +1 Attack (+2 Attack instead if it is an Uruk).