Watchful Eyes
Khazad-dûm#62 (x3/x0)
Treachery

When Revealed: The first player attaches Watchful Eyes to one of his heroes. Counts as a Condition attachment with the text:

Limit 1 per hero. Forced: If attached hero is exhausted at the end of the combat phase, reveal 1 card from the encounter deck and add it to the staging area.