Orc Infiltration
Trial Upon the Marches#208 (x2)
Treachery

When Revealed: Shuffle the enemy in play with the lowest into the first player's deck. When that enemy is revealed, discarded, or drawn, it engages the first player and makes an immediate attack.

Suddenly a watchman gave a call, and leaping up they saw three hooded shapes, grey-clad, going stealthy among the stones.
-The Children of Húrin