Hollow Circle
Fog on the Barrow-downs#5 (x1)
Location
3 (3)
Ruins.   Downs.  

Immune to player card effects.

Travel: Each player searches the encounter deck and discard pile for a Wight enemy and puts it into play engaged with him. Shuffle the encounter deck.

It was shapeless and yet significant: like a landmark, or a guarding finger, or more like a warning.
–The Fellowship of the Ring