Dragon Age: Ascension
The darkspawn are a race of mostly-humanoid tainted creatures that dwell in the Deep Roads. According to the Chantry, they were created when the magisters of the Tevinter Imperium opened a portal into the Golden City, tainting the realm of the Maker with their corruption and returning as the darkspawn, their evil transfiguring them into the monsters they became. When they uncover one of the Old Gods, they expose it to the taint, changing it into an Archdemon, which then leads them in an attack against the surface world called a Blight. The darkspawn are perhaps the greatest single threat to all of Thedas; they are bloodthirsty, exceptionally numerous and willing to indiscriminately kill or corrupt all in their path.