Remnants of Elder Days
The Nîn-in-Eilph#111 (x1/x0)
Treachery

When Revealed: Each player must search the encounter deck or discard pile for a Creature enemy and put it into play engaged with him. Shuffle the encounter deck. This effect cannot be canceled.

"An evil of the Ancient World it seemed, such as I have never seen before..."
–Aragorn, The Fellowship of the Ring