Six Paths Senjutsu

The Six Paths Sage Technique is a technique which drastically empowers all of the user's abilities to a far greater extent by combining senjutsu and tailed beast chakra.

Overview
The user's physical strength, speed, stamina and regeneration are exponentially increased. The user also gains the ability to use senjutsu and fly, as well as use chakra arms and create multiple Truth-Seeking Balls (although the Truth-Seeking Balls aren't always necessarily linked with this technique). Apperance-wise, this form creates a pattern of Rinnegan and nine tomoe on the user's back, as well as cause the user to grow horns on their forehead.

Sage of Six Paths Mode
The. is achieved by Naruto by combining the chakra of the nine tailed beasts with the Six Paths Sage Chakra. It takes on a similar appearance his Sage Mode, Nine-Tails Chakra Mode and Tailed Beast Mode cloak. It enhances Naruto's abilities, allows him to use Truth-Seeking Balls, and enhance his Tailed Beast Mode cloak of Kurama as well.

Six Paths Ten-Tails Coffin Seal
The is a sealing technique used by Madara and and Obito in order to become the Ten-Tails' jinchūriki. After performing the necessary hand seals while in close proximity to the Ten-Tails' body, the beast is quickly absorbed into the user's own body. It allowed both Uchiha to use multiple Truth-Seeking Balls, and each wield half of Hagoromo's shakujō. As the jinchūriki of the Ten-Tails, both gained immense increases in their physical capabilities and were able to completely overwhelm their powerful adversaries, as well as enhanced regenerative powers and durability.

Trivia

 * Despite the fact that all users of the Six Paths Sage Technique have gained access to the Truth-Seeking Balls, Kaguya is the only person that has the ability to use Truth-Seeking Balls without signs of usage of this technique.