The Miniaturist

 was ancient interdimensional creature that rested in the Zechstein Mine. She took on an appearance of an older Dodo Chaplet to Dodo. She had the ability to make things smaller, including bridges and people, as well as the TARDIS. She was in pain but eh noise of the different dimensions. She asked the First Doctor to join her in her travels, trying to uses his memories of Dodo, Susan Foreman and Vicki Pallister, but he declined. He bargained with her not to play with more humans. (AUDIO: The Miniaturist)