Giant Worm

This summon is a colossal worm-like animal, that has a giant Rinnegan eye in its mouth, implying its master is a wielder of the Rinnegan.

Appearance
This giant worm is a giant-sized grub, capable of towering over any building in Harugakure. It possesses two large limbs at its front, which it uses to travel through irregular surfaces. Its skin is reminiscent of steel, as stated by many shinobi who fought it, due to its toughness and resistance to damage. Its most distinct feature is its face. With an enormous jaw, capable of swallowing houses whole, the giant worm has large and thorn-like protrusions around its mouth, which are likely to be used to kill its targets. Inside the mouth, it has human-like teeth, but many times larger, and its Rinnegan can be seen where its throat starts.

Abilities
While only shown for a relatively short timespan, this giant worm was capable of not only overpowering the majority of shinobi in Harugakure, as it was able to spew out a strong toxin-based poison, that not only killed dozens more, but it also left a trail of destruction where it spread. It also possesses very hard but flexible skin, which can resist kunai, shuriken, fire-based abilities and the rubble that it traverses through.

Trivia

 * The giant worm was inspired by the, one of the many monsters of Japanese folklore represented in the as a serpentine-like creature.