Demonic Statue of the Outer Path

The Demonic Statue of the Outer Path is a personal summon of Nagato.

Appearance
It is a giant statue of a creature that is on all fours with a humanoid face. The face doesn't seem to have any eyes, while the back of the statue has rocky protrusions jutting out of its shell. Overall, the statue is a reminiscence of a demonic turtle.

After joining Akatsuki, the statue has been given additions of a blindfold with nine closed eyes on it. It also seems to be more bipedal, as it is holding its two forearms in front of it, with a pair of shackles chaining them together. The statue's mouth has a bit. When in use, one of its nine eyes open in correspondence to the tailed beast being sealed, and the bit in the mouth is dropped.

Ame Orphans vs. Hanzō the Salamander
The statue was first seen used by Nagato to fight against Hanzō, Danzo, and their forces. It was summoned to retaliate against them forcing him to kill Yahiko, and Nagato used the statue's ability to rip out the souls of his victims. Hanzō and Danzo survived, but their forces were annihilated.

Akatsuki's tailed beast collection
Years later, the statue has been modified to extract tailed beasts. It was first used to extract two unknown beasts from their Jinchūriki, as well as one other tailed beast (whether this one had a host or not is unknown). The first onscreen extraction was the One-Tailed Shukaku from Gaara. Next came the Two-Tailed Monster Cat from Yugito Nii and the wild Three-Tailed Giant Turtle. Also came the Four-Tailed Monkey from Rōshi. Upon capturing the Eight-Tailed Giant Ox's jinchūriki, Killer Bee, they attempted to commence with the extraction. However, when it was revealed that Killer Bee has left a tentacle disguised as his own body, the ritual failed.

Nagato's demise
Upon Nagato's demise, Madara Uchiha claimed that they need a new pawn to synchronize with the statue, and thought of using Sasuke Uchiha to do so, but plans to wait until they can be sure they can manipulate the boy.

Abilities
The statue was used originally used by Nagato to perform the Summoning: Demonic Statue of the Outer Path, which links the statue to Nagato's body, and allowing him to create an spiritual dragon-like creature from the statue's mouth, which upon contact would tear out the soul of the victims, killing them.

When joining Akatsuki, Nagato has modified the statue to be able to seal tailed beasts into it. This is achieved through the Sealing Technique: Illusionary Dragon Nine Consuming Seals. The tailed beasts must be sealed in a specific order, lest the statue be destroyed. Upon Nagato's death, Madara plans to synchronize the statue with Sasuke. While Nagato planned to use the collected tailed beasts to create a super weapon to cease war, Madara planned to recreate the Ten-Tailed Beast and become its host, so he could cast an Infinite Tsukuyomi to control the world, all part of his Moon's Eye Plan.