Hastur
From Arkham Horror Wiki
Hastur is an Ancient One. He first appeared in the Arkham Horror board game.
Sheet info
Combat rating: -X
Defenses: Physical Resistance
Worshippers: Hastur's worshippers ride byakhee mounts that they call with enchanted whistles. Cultists are flying monsters and their combat rating is -2.
Power: The King in Yellow - While Hastur stirs in his slumber, the cost to seal a gate is 8 Clue tokens instead of 5.
Start of Battle: X is set to the current terror level.
Attack: Each investigator must pass a Luck (+1) check or lose 2 Sanity. This check's modifier decreases by 1 each turn (+0 the 2nd turn, -1 the 3rd turn, etc.)
Doom Track: 13
Plots
Mythos Source
The name Hastur first appeared in Haita the Shepherd (1893), written by Ambrose Bierce, where he was a benevolent god of shepherds. Robert W. Chambers appropriated the name for use in his anthology The King in Yellow (1895). The first Mythos story to use the name was The Whisperer in Darkness (1930), written by H.P. Lovecraft.

