The 4′ long 1/2″ thick Rattan Cane is a walking stick and sometimes-weapon favored by Thad, who also uses it as a focus for harnessing and projecting his psychic will. Dyluck uses the weapon as a foci in a similar fashion, to a much greater effect.
Greymalkin apparently recognized its intended use, insisting that Ornix carry it aboard the Daedalus.