Super Beast Imitating Drawing: Snake

Sai creates snakes ranging in sizes, from either his scroll or from ink mixed into water, that can be used as ropes to restrain someone. With the ability to soundlessly enter through even the smallest crevice, they can also be used for assassination purposes.

Trivia

 * While unnamed in the manga and anime, it was named in Naruto Shippūden: Ultimate Ninja Storm 2 and the Naruto Collectible Card Game.
 * This technique appears to work fine in water, despite Sai saying Super Beast Imitating Drawing techniques don't work as well in rain.