Thunder Dragons are the masters of electricity. Their wings gather energy as they soar through the clouds, and when they clap their wings together they can create devastating arcs of lightning. They can stay airborne nearly indefinitely, landing only to sleep and breed; they catch their prey from the air and take moisture from the clouds. A thunder dragon’s roar is considered to be an omen of misfortune.

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.

A strange Thunder dragon, Cake is often rumored to not even exist! While there are many rumors about her being a lie circulated by GLaDOS in order to frighten others into going through with her insane tests (if they refuse, GLaDOS says, Cake will strike them dead on the spot), these rumors themselves are entirely lies.

Quite the opposite of a dragon who will kill, Cake simply wants to be left alone in her cave, far from the prying eyes of others. Ever since it was discovered Thunders were able to combine their powers to summon a creature of intense strength, she has become even more removed from the world.