Origami

Origami was an art form using folded paper or card.

The Origami Empire of Draxos Eleven and Twelve was a space-faring empire which spread across at least two planets. According to the Tenth Doctor, the Origami Empire had made no technological innovations, and were able to build their advanced society and travel through space through nothing but "the elegant and intricate folding of card". (PROSE: Sick Building)

The Sixth Doctor encountered an army of origami warriors on Draconia. (AUDIO: Paper Cuts)

Strax used incendiary bombs to destroy the origami birds that attacked Clara Oswald whilst she was investigating a deserted factory on Alberneath Avenue. (PROSE: Silhouette)