i really dont like this, But if they add new cards to classic set or cards from previous set (like next expantion) and keep the classic set, let's say "balance" and "fresh", and with a chance to see those "gone cards" back (SOME DAY) in classic set again...... is fine by me.
Many other CCG's / TCG's have separate ground and air units. To where a ground unit cannot attack an air unit for example. With the announce of the "Year of the Raven", it makes me wonder if Blizzard is thinking of having some sort of flight/air mechanic in the game this year.
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