Kekkei Kōtai

Kekkei Kotai (血継煎薬; "Bloodline Shifting") is a unique bloodline variant of the offspring of Chiyoko Otsutsuki. It allows them to switch between bloodline limits within the family itself, meaning while they can only keep a default number at a time, they can shift between them at any given moment, allowing them to switch up the skill sets and techniques they are granted. They themselves don't have to possess the original bloodline, as they can shift their own through DNA connection with someone directly related to them, such as their parents, due to an unknown mechanic.

Kamiko Otsutsuki was only born with a single bloodline, so by default, she can only switch between and possess one at a time. It's currently unknown if Osamu Otsutsuki possesses the potential for Kekkei Kotai, though Chiyoko said its highly probable. Drawbacks and requirements for it is also currently unknown.