Dakō

The is a prototype weapon that was created by Iō of Konohagakure. It is a cross-shaped spear that can stretch, contract and bend in various directions. When stretching, it can be lauched with enough force to pierce stone and can even change directions mid-attack. The spear's malleability can also aid the wielder in manoeuvring.

Trivia

 * literally means "going like a snake". It also translates to "meandering" or "crawling".

Dakō pt-br:Dakō Dakō