The Great One (Planet of the Spiders)
From Tardis Wiki, the free Doctor Who reference
The largest of the Eight Legs and ruler over all of them, the Great One sought the crystal which Third Doctor had stolen and taken to 20th century England.
The Great One lived in a cavern made of blue Metebelis crystals. She believed that with the last great crystal placed above her head, she would have infinite power and knowledge. The radiation of the crystal, instead, destroyed her
