You are playing Campaign Mode.

Setup: The first player attaches Old Bogey-stories to a hero in play.

It was not called the Old Forest without reason, for it was indeed ancient, a survivor of vast forgotten woods; and in it there lived yet, ageing no quicker than the hills, the fathers of the fathers of trees, remembering times when they were lords. The countless years had filled them with pride and rooted wisdom, and with malice. –The Fellowship of the Ring

Resolution: If there are at least 12 damage tokens on Old Man Willow, the players have earned the Old Bogey-Stories boon card.

Tom Bombadil burst out laughing, "Well, my little fellows!" said he, stooping so that he peered into their faces. "You shall come home with me! The table is all laden with yellow cream, honeycomb, and white bread and butter. Goldberry is waiting. Time enough for questions around the supper table. You follow after me as quick as you are able!" With that he picked up his lilies, and then with a beckoning wave of his hand went hopping and dancing along the path eastward, still singing loudly and nonsensically.
–The Fellowship of the Ring