The Necromancer may have been cast out of Dol Guldur, but a lingering darkness remains over Mirkwood, a shadow that will grow ever longer as the years draw on - unless a fellowship of heroes step forward and hold back the gloom. The Darkening of Mirkwood is a complete campaign for The One Ring, set in Mirkwood over the course of three decades. This supplement includes rules for Holdings that allow players to carve out their own corner of Middle-earth, whilst new options for the Fellowship Phase and Undertakings to achieve to chart their own path. Visit the Parliament of Spiders, do battle with the Nazgl, meddle in the affairs of Wizards, and enter the Halls of King Thranduil. Stand firm against the Shadow and maybe the Darkening of Mirkwood can be averted. Falter for even a moment and all that you know and love will be lost!