Chain Wind Staff

Tenten summons from one of her scrolls a short wooden staff with two chains attached at both sides, and throws it at the enemy in a spinning, boomerang-like fashion. The quick rotation speed of the two chains was powerful enough to cut through the helmet of the Cursed Warrior.

Trivia

 * Despite summoning weapons normally don't require a blood contract, Tenten actually used blood to summon this weapon.