Opponent blocked my Wharf Skaab with a Shadeborn Steed, killing both. It looked like the Shadeborn finale targeted the Ebondeath in my hand of three cards, which had reduced cost from a previous Diehard Fan. I got an error message saying something about a database error, and when I clicked out of it I still had my entire hand, plus another Diehard fan from the Skaab. Expected behavior was to have lost a card from my hand, presumably the Ebondeath.