Gate of Dol Guldur
Attack on Dol Guldur#20 (x2)
2 (4)
While Gate of Dol Guldur is in the staging area, it gains: "The player cannot travel or place progress here unless they are at stage 3B. Each player's threat cannot be reduced by more than 1 each round by player card effects."

"Before you could get round it in the South, you would get into the land of the Necromancer..."
-Gandalf, The Hobbit