Dragon

Summary
The dragon is a fearsome flying unit and is capable of terrorizing both ground and air units alike. Unlike the balloon, which also flies, the dragon has a ranged attack, similar to archers. This paired with its ability to fly makes it a force to be reckoned with in battle. The disadvantage of using the dragon is that it does not target a specific buildings. So you may also want to pair the dragon with Giants and a few wall breakers to clear out the defenses easily.