Board Thread:News and Announcements in game/@comment-2113997-20190307212542/@comment-34531605-20190320223308

I imagine that if they introduced a trading system, it would cost dragon stones.

Further, I disagree that you must pull 5 copies of a unit and have it SA before you can trade it. Common sense says that if you were going to trade a unit you'd be starting from the 6th anyway. I think the best restriction that they could place on it is to band up the units by cost and you can only trade units that cost the same or within a certain range.