Enough with the bashing of the Emerald Dragons. They, by the way, are second only to the Black Dragons and Lava Golems in terms of damage, if you use their acid breath effectively. They are the most proactive unit at level 7, and one of the most proactive units in the game.
What does it mean to use them effectively? Constantly attack several units with them? But they won't always line up in a row for you... Although, I must admit, they do this quite often.