Ruyi Jingu Bang (Chinese)
When Sun Wukong, the fabled monkey king from "Journey to the West" grew bored of his duties, he departed. Seeking a weapon worthy of his own hands, he would head to the east sea to find the dragon king Ao-Kuang, and his mighty collection of weapons. The dragon would suggest a large black-iron rod by the name of Ruyi Jingu Bang, the rod used by the gods to flatten and measure the bed of the Milky Way. When not in use, the holy staff was said to be no bigger than a needle, but upon the will of the user, it could grow large enough to fill the universe.