Mind Watcher

Flying, hexproof
At the beginning of your upkeep, choose a card
in target opponent's hand. That opponent plays with that card revealed as long as it's in their
hand.
"Undoubtedly, I know these creatures are following me. Their third eye seems to be a result of tampering with a native owl and is being used for enhanced sight. I caught one last night trying to peck open the lock of my field guild."