Black Receiver, Narutopedia
Black Receivers are black rods that function as demodulators for high-frequency chakra signals. Users are able to create and transmit their chakra into these receivers for a variety of purposes. Black receivers are said to be a trademark of the Rinnegan. Wielders of the dōjutsu are able to generate the rods from their own bodies, usually from the palms of their hands. However, there have been several instances in which black rods were produced through other means: While connected to the Demonic
Blood Needle, Narutopedia
Truth-Seeking Ball, Narutopedia
Every Jutsu In Naruto: Part 2
Naruto Chapter 443 – Naruto's Decision
Prelude: All according to Plan by KamiZephyr on DeviantArt
Body Coating, Narutopedia
What does Pain's black rods do in Naruto? - Quora
Naruto's Furrow, Narutopedia
What does Pain's black rods do in Naruto? - Quora
Narutopedia - Tools: Antidote, Barrier Tag, Bashōsen, Benihisago
Black Zetsu, Narutopedia
How did Naruto get Truth-Seeking Balls? - Quora