Carrionite

The Carrionites were an entirely female species of humanoids. (DW: The Shakespeare Code)

Physical appearance
The only notable differences in appearance between a Carrionite and a near-Human were wrinkled faces and teeth being entirely sharp canines, however they could shapeshift into near-Human form at will. (DW: The Shakespeare Code)

Abilities
Carrionites could fly, dematerialise and rematerialise at will and use poppets to cause odd deaths in enemies, their abilities described as witchcraft. In fact, their science was based on words, as opposed to the mathematics of most species. (DW: The Shakespeare Code)

History
At "the dawn of the Universe", the Carrionites evolved in their 14-planet star system and developed their word-based science. However, the Eternals banished them to the Deep Darkness using a special word of power.

Several billion years later in the late 1500s, a group of three - Bloodtide, Doomfinger and Lilith - escpaed using words which acted as words of power from the plays of William Shakespeare. They designed the 14-sided Globe Theatre based on the planets of their star system, and, in 1599, planned to use his new play, Love's Labours Won, to free the rest of their race from the Darkness and take over Earth, removing Humanity from it as a pestiliance, to establish the "Millenium of Blood".

The last few lines of the play were written by Shakespeare in a trance to be a spell said by one of the cast of the play to open a portal from the Deep Darkness to this universe, however the portal was closed and the race of witches and all copies of Love's Labours Won vanished into the Darkness thanks to the help of the Doctor, who told him that he was "the wordsmith" and could create the new words of power to send them back into the Darkness, and Martha Jones, who provided the last word - "Expelliarmus" - from the Harry Potter series of novels.

The Carrionites were probably his inspiration for the Weird Sisters of his play, Macbeth. Shakespeare also gained inspiration for many other of his plays that week. (DW: The Shakespeare Code)