Sasuke new hand
You're referring to Sasuke Uchiha's new hand!
In the Naruto series, Sasuke's original hand was severely injured during his battle with Itachi Uchiha, his older brother. As a result, he lost his left hand and was forced to use a prosthetic replacement.
However, in the later parts of the series, Sasuke's hand is restored to its original state after he undergoes a surgical procedure performed by the legendary doctor, Mei Terumi. This new hand is a result of Mei's advanced medical technology and Sasuke's own unique chakra.
The new hand is significantly different from his original one, with a more refined and elegant design. It also possesses enhanced strength and agility, allowing Sasuke to perform more complex and precise jutsu (ninja techniques).
The new hand has become an iconic part of Sasuke's character design and is often depicted as a symbol of his growth and development as a ninja.