Forced: After travelling to Tower Gate each player places the top card of his deck, face down in front of him, as if it just engaged him from the staging area. These cards are called 'Orc Guard', and act as enemies with: 1 hit point, 1 and 1

"I myself dared to pass the doors of the Necromancer in Dol Guldur, and secretly explored his ways."
–Gandalf, The Fellowship of the Ring