Balloon Dragons are so named because they are filled with a gas that makes them almost lighter than air, similar to balloons. However, they are not prone to bursting, as they are covered in tough skin and can deflate themselves if necessary. In addition, they generally are slow moving. They use their gas bladders to float to the tops of trees, where food is more abundant. They can shift their weight from their backs to their fronts, allowing them to reach leaves and fruit.

Dragons are highly-intelligent reptilian creatures that—from a human perspective, at least—appear to live forever. Many different varieties of dragon exist, each with their own unique qualities, habitats, and behavior. Adolescence in dragons is usually marked by the growth of a hatchling’s wings, although not all breeds of dragons grow wings and some breeds have other traits that indicate the beginning of maturation. In Galsreim, dragons and humans coexist peacefully.

The Currency Troll is a truly evil dragon indeed. He loves to travel to sophisticated dragon societies where currency is used—and troll them hard! A master counterfeit, he need only to look at a set of their puny coins before he uses (counterfeit!) money to buy metal and copy their puniness to death! After he is done, he releases hoards of almost perfectly lookalike coins into the society's currency system and watches the mayhem as the officials finally notice the huge influx of money and try to figure out what is going on. But oh no! Before they figure out that it is a counterfeit apocalypse they are dealing with, the troll would have already put out fake "Half Price!" signs on all the poor, hapless shopkeepers' stores, resulting in a huge economic crash! After that, he cackles evilly and stealthily escapes, to troll many more societies. Many credit him as the founding father of an infamous market aspect—inflation, which is appropriate as he is none other but a balloon dragon!