Ah, let's see. The place, Bronze Arena. AI uses Nightmare on a Forest Spirit. A few turns later, after drawing with Hasten [I had drawn a Blessing, which I used on the Warden] and ending my turn, the message popped up informing me that I had to discard a card from my hand. Then the outline of a card popped up with no image and the cost next to it. Going over it gave no card information, but I assume it was the other Hourglass in my deck.
