Swarming Goblins
The Mines of Moria #51 (x3)
Enemy
14
(12) 1 2 1 2
Orc.   Goblin.  

When Revealed: Return each copy of Swarming Goblins in the encounter discard pile to the staging area.

Shadow: If the attacking enemy is a Goblin put Swarming Goblins into play engaged with you.