Samsara Chakra

Saṃsāra Chakra (Seishi Chakura, 生死チャクラ) is the unique of Kisshoten Benzaiten. Being the progenitor of progenitor of the Benzaiten and Ōtsutsuki Clans, is can be used to grant someones the use of Shinshinshu as well as evolve the into a ; a  into a ; and a Rinnegan into a  respectively. The mechanism behind this change is unknown, and apparently has to be enabled, as the process isn't autonomous.

The exact nature of this special chakra isn't clear, but what is known is that it improves the power, abilities, attributes of the user and their techniques by an astounding margin. On an interesting note, this unique chakra negates the likes of and the, rendering them useless and ineffective on the user.