White Dragons are pacifists and specialize in extremely strong healing magic. The only limit of this magic is that it can’t bring back the dead. They only eat plants and never kill living things.

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.

Although House is a doctor like many of his breed, most dragons refuse his treatments because, despite his near-psychic ability to diagnose any malady, his brusque demeanor and blatant misdrakontasy, they'd apparently rather escape with a 'good' doctor who 'knows how to treat an invalid'. According to him, they simply don't understand that his greatest love is not healing, but diagnosing; solving the puzzle is always his first and foremost goal. And it's never lupus.