Ent of Fangorn
The Treason of Saruman #46 (x4)
Objective-Ally
2 4 3 4
Ent.  

While Ent of Fangorn is in the staging area, it gains: "QuestAction: Exhaust a hero you control to discard the top card of the encounter deck. If that hero's is greater than the discarded card's place 1 resource here. Then, if there are 3 resources here, discard them to take control of Ent of Fangorn. Any player may trigger this effect."