Encounter set:
Passage Through Mirkwood
Forest.
Response:
After you travel to Old Forest Road, the first player may choose and ready 1 character he controls.
...Beorn had warned them that that way was now often used by the goblins, while the forest-road itself, he bad heard, was overgrown and disused at the eastern end and led to impassable marshes where the paths had long been lost. - The Hobbit