"The Unspeakable One"
Hastur was introduced in the Signs of Carcosa expansion.
When 2 Mysteries have been solved, investigators win the game.
The players have 11 spaces on the Doom counter before Hastur awakens.
Far from Earth beneath the star of Aldebaran, the Unspeakable One sleeps imprisoned within the core of one of the dark stars of the Hyades. Trapped there in a war long forgotten, he dreams of escaping to exact his terrible will upon the cosmos.
Set aside 1 Byakhee Monster and all Hastur Special Encounters.
The modern description of Hastur typically describes him as a tentacled vaguely humanoid shape clad in a tattered yellow robe.