During the last game, we had a debate about the ability of an Act 1 shop item. I don't have the card with me, but I think the name of the item is Shadow Cloak (it costs 75 gp). It works somewhat like the Shadow ability of the Shadow Dragon, but for a hero: the monster has to "waste" a surge.
The overlord rolled three surges. He could use two of them, but he didn't have a third ability to spend on the last one. Could the cloak be used to waste one of the used surges, or does it necessarily apply to the third unused one?