The Wicked Willow
The Old Forest#6 (x1)
3A-B (18)
When Revealed: Add Old Man Willow and Withywindle to the staging area. Reveal X encounter cards where X is the number of players in the game minus 1.

He lifted his heavy eyes and saw leaning over him a huge willow-tree, old and hoary. Enormous it looked, its sprawling branches going up like reaching arms with many long-fingered hands... -The Fellowship of the Ring

Old Man Willow cannot leave the staging area but is considered to be engaged with each player and attacks each player in turn order during the combat phase (deal and resolve a shadow card for each attack).

If the players defeat this stage, they win the game.

"I don't like this great big tree. I don't trust it. Hark at it singing about sleep now!" –Sam, The Fellowship of the Ring