Fallen Into Evil
The Road Darkens#83 (x1/x0)
Treachery
When Revealed: Attach to a non-Fellowship hero and move it to the first player's staging area. (Counts as a Condition attachment with the text: "Attached hero loses the hero card type and gains the enemy card type with equal to its and engagement cost equal to its threat cost. If Fallen into Evil is discarded, return attached hero to its owner's control")