Shadowverse

In general, the system isn't very good at handling animated cards, especially when it comes to timely removal. I'll need to clean up all of this later.

In Hearthstone, there's a wonderful "extra" filter for this purpose – it only shows cards that you have in a quantity greater than what fits in a deck (it doesn't matter if they're regular or animated). This is one of the two things I miss in the Heroes of Might and Magic collection (the other is the ability to quickly navigate to a card in the collection that's also in your deck while editing). On the other hand, Heroes of Might and Magic could use a few more button-based filters, like in Hearthstone, which can be enabled in any combination, rather than having to type "legendary" manually.

Added 1 minute later

Because they don't see his face and imagine that everything cool is hidden under the armor. And then they'll release a leader, and it turns out to be Koschei.

I think the dragoon leader won't look visually different from the dragoon on the map. If they even transferred the screaming guy to be a leader without any changes...