Smoke demons are a race of demons native to Infernus. They live close to the 'heart' of Infernus and embody the element of smoke. Zaros killed a large smoke demon to create the Smoke crystal for Nex.
- ^ The Promised Gift, written by Zaros, RuneScape. "I created the stone of smoke from the remains of an especially large smoke demon from Infernus. Smoke demons are amongst the most inscrutable of demons, close in nature and in location to the heart of their world, and a powerful embodiment of that element."