Nyctalus Arachnis

The Nyctalus Arachnis or Nightcrawlers are a spiderlike race with webbing forming between their legs, allowing them to glide. They have venom sacs that allow them to brew many of the known, and even unknown poisons and acids of the cosmos, making them deadly in combat, but also natures architect, as they are responsible for many natural caverns, caves and formations in rock, since they use their acid to create these.