Ravnica Races Expanded introduces six new playable races present on Ravnica, including:
Gorgons, also known as medusas, capable of turning their foes to stone with a gaze.
Faeries, who gain both great advantages and disadvantages from their tiny size.
Dryads, stewards of nature who are innately resistant to unnatural arcane forces.
Kraul, humanoid insects that dwell among the many other species of insects that inhabit the deepest caverns of the Undercity.
Sentient weirds, an experimental race created by the Izzet League, that can absorb and resist different types of elemental damage.
Vampires, who can manipulate or read the minds of those whose blood they consume, and gain greater powers from their dark immortality as they gain experience.
- from the publisher's blurb