Yibb-Tstll

Yibb-Tstll (The Patient One, The Drowner) is an Outer God. She sits at the centre of all time and space and watches over all of creation. Her vast knowledge second only to that of the omnipotent Yog-Sothoth.
Yibb-Tstll appeared as a central part of Brian Lumley's The Horror at Oakdeene. Here, she was invoked by a group of nurses and inmates at Oakdeene Sanitorium, though the group did not know all of the protective rites required to shield themselves from her power. Ultimately, she killed five of the inmates, completely cured five more, very messily dispatched one of the nurses and drove another irrevocably insane after simply smiling at him. 
Yibb-Tstll also appears in Lumley's other works, including the cycle about David Hero and Eldin the Wanderer.
== Appearance ==
Yibb-Tstll is described as a writhing morass of squirming tentacles topped with a grotesque head, detached eyes and vast, leathery, bat-like wings, beneath which numberless nightgaunts suckle viscous black milk from her multitude of breasts. As with all of the Outer Gods, the merest sight of Yibb-Tstll is enough to drive mortal men incurably insane, and it is said that even thinking too hard about her will draw her malevolent attentions.
Yibb-Tstll has a disgusting dark liquid called The Black instead of blood, and she is capable of using this as a weapon, deploying it as a cloud of ebony "snowflakes" which descend on a victim and slowly smothers him.
== Cult of Yibb-Tstll ==
There is a temple of Yibb-Tstll in the Great Bleak Mountains. One of her servants is known to be Thinistor Udd, an evil wizard-priest. He created an avatar of Yibb-Tstll in the shape of a stone idol which walked at his command.
Category:Gods
Category:Gods and god-like beings
Category:Outer Gods
Category:Brian Lumley's lore