The Chain Wind Staff is a weapon wielded by Tenten. It is very similar to a short chigiriki, albeit it has a weighted chain attached to each end. It is summoned from one of Tenten's smaller scrolls and can be thrown like a boomerang of sorts. The quick rotation of the two chains was shown to be powerful enough to cut through the helmet of the Cursed Warrior.
Despite summoning weapons not requiring a blood contract, Tenten actually used blood to summon this weapon.