Shub-Niggurath is often called the "Black Goat of the Woods with a Thousand Young", and is the force of creation, life, evolution/mutation. She represent the force of the one universal constant (ie change) on the biological. She is often envisioned as a dark, low lying cloud, with goat's hooves with numerous tenticals writhing from within. Her rites are best performed during a New Moon, or on Mid-Summer's Eve.