Akhaten
From Tardis Wiki, the free Doctor Who reference
Akhaten was a parasitic, sentient planet that fed on the souls, and therefore the stories, of the inhabitants of the other seven planets in the system. He was considered by the people of these worlds to be a great and fearful god.
File:TheOldGod.png
The 'Old God'
Biography
It slumbered for thousands of years until the Long Song ended, when he awoke and threatened to consume all seven of its neighbouring planets. Eventually, the Eleventh Doctor let him take his memories instead of the valuable things of the natives of Akhet. The Doctor was then saved by Clara Oswald, who gave the Old God the leaf that told all of her family's story, all that happened, all that didn't happen and all that should have happen. The overload of stories caused him to implode. (TV: The Rings of Akhaten)
