Some people know differently, as they were fierce opponents of the Moths and other inapt.
It is later discovered that they are no myth, but inapt sorcerors of great power who are the hidden rulers of Khanaphes. They are marble-skinnd, tall and statuesque.
Slug Cities: Khanaphes, technically.
Slug Arts: Their large size is probably innate, but it is unknown whether their ability to appear as motionless statues and hibernate is an art or magic. They seem to secrete a gelatinous slime that coats their tunnels and causes hallucinations or a telepathic link when consumed by another.