Devilry of the Dark Land
The Dead Marshes Nightmare #10 (x1)

When Revealed: Return the top X Undead enemies in the encounter discard pile to the staging area, where X is the number of players. If no enemies were returned to the staging area as a result of this effect, Devilry of the Dark Land gains surge.

Escape: 10

'But that is an age and more ago,' said Sam. 'The Dead can't be really there!' –The Two Towers