Driven by Shadow
The Dark of Mirkwood #16 (x2)
Perfidia

When Revealed: Each enemy and each location currently in the staging area gets +1 Threat until the end of the phase. If there are no cards in the staging area, Driven by Shadow gains surge.

Shadow: Choose and discard 1 attachment from the defending character. (If this attack is undefended, discard all attachments you control.)