Polar-creature
From Tardis Wiki, the free Doctor Who reference
These giant, hot-headed creatures maintained their cold limbs by drawing heat away from the body and storing it in their lungs.
When a polar-creature found himself at the Nebulon Colony in 3415 AD, it was so taken by the peace and harmony of the colony, believing it to be perfect, that it froze it, to remain unchanged for one hundred years. He protected his precious colony but after talking with the the Doctor realised he had taken away the qualities that made it so special and unfroze it with the heat from his lungs.
