Yarkdao

The Yarkdao are a sapient alien species which inhabits the planet Tond, orbiting a binary system consisting of the green star Yifne and the "dead star" Baalblo. Their existence is documented in the grimoire known as The Revelations of Glaaki.

Biology
The Yarkdao are humanoids with retractable ears.

Culture and society
The Yarkdao are polytheists and perform elaborate religious rites that last for three years and a quarter (a period they refer to as a "puslt") and cannot be interrupted. Their cities are built out of blue metals and black stone.

In The Revelations of Glaaki, the Yarkdao are referred to as the ruling race of Tond, which might indicate that there are other races who serve them.

Appearances

 * "The Inhabitant of the Lake", by Ramsey Campbell (1964)
 * "A Madness from the Vaults", by Ramsey Campbell (1972)