Rinnengan

“We are but men, drawn to act in the name of revenge we deem to be "justice". But when we call our vengeance "justice", it only breeds more revenge ... forging the first link in the chains of hatred.” ― nagato uzumaki

Capabilities.
The Rinnengan Is the god of the three great dojutsus. The dojutsu of Ōtsutsukis. Only a few shinobi were able to reach it Madara, Sasuke, Momoshiki, and Kaguya. To unlock it you need to eat the fruit of Tree of Life or mix Asura and Indra's blood.

The powers.
The Amenotejikara is a space-time ninjutsu used by Sasuke Uchiha after obtaining his Rinnegan.

The Animal Path allows the Rinnengan user to summon powerful Animals: Giant Drill-Beaked, Bird Giant multi-headed Dog, Giant Snake-Tailed Chameleon, Giant Panda, Giant Ox, Giant Rhino, Giant Crustacean, and Giant Centipede.

The Asura Path grants the user the ability to augment their own body to summon mechanised armor and various ballistic and mechanical weaponry such us rockets, hand launch, and a lot of other things.

The Chakra Absorption I think the name tells everything, You can absorb jutsus with your hand.

The Takamimusubinokami is the ability that Momoshiki used when he attacked the chunin exams, he absorbs the incoming attacks and counter attack with it. abilites of it: Crimson Flame, Deep crimson Spiral, Fire Release Bullet: Blaze, Lighting Release Bullet: Powerful Breath, Pheasant Hunter, Shadow Imitation technique, Tailed Beast Ball, Water Release Bullet: Orca, Water Release: Torrent Bullet and Water Release: Water Dragon Bullet tTchnique.

The Deva Path  You can manipulate the gravity, pull, and push away, the jutsus it gives are : Banshō Ten'in, Chibaku Tensei and Shinra Tensei.

The Preta Path grants the user the ability to absorb chakra in any form.

The Naraka Path  grants the user two main abilities: interrogation and restoration, by using the King of Hell.

The Human Path grants the ability, to read in peoples mind, or get their soul out of them, killing them with this.

The Outer Path Gives you the abilities of all path.

The Tengai Shinsei allows you to make a giant meteor after finishing some hand sings, requires susano'o to do it.

The Limbo allows you to make invisible 'shadows', if you have 1 rinnegan (In one eye) you can make 2 if you have 2 rinnegan (both eyes) you can have 4, In sage mode, it can be sensed but it's only visible for rinnengan users.