Memory:Air demon

A swirling mass of air forms a dusty representation of something infernal. An electric charge seems to dart within and around the airy mass, always speeding to and from two points in the central mass which appear to be eyes; the lightning seems to fly from them toward whatever they focus upon. Whatever its origins, it seems malevolent toward others that do not share its elemental qualities. You face a mass of vapours and fumes, moving of its own accord. A demonic force animates it and gives it a vaguely humanoid shape; pure evil glints in its eye.