Creature (The Monsters of Coal Hill School)

A humanoid creature created a replica of Coal Hill School on another planet and abducted Clara Oswald and Jeff Delobel to teach English and French respectively to a horde of aliens in the hopes that the learning would proceed to an invasion of Earth. The Twelfth Doctor came to the planet looking for Clara. He told the creatures stories of an adventurer who defeated would-be conquerors. The Time Lord asked them to guess of whom he spoke, and with the realisation that it was the Doctor the creature abandoned their scheme. (COMIC: The Monsters of Coal Hill School)

The creature was dark-green in colour, whilst having bright orange hair and a long yellow tongue. It spoke very good English.