Sasuke, in his right eye, possesses the Eternal Mangekyou which allows him to use jutsu called Katgutshuchi. Katgutshuchi allows him to manipulate the form and shape of the black flames he produces. 

The Most Powerful Eyes Necklace Comes With 2 Micro Curb Style Chain And The Chain Length Of Your Choice! The Pendant And Chain Are Made From High-Grade Stainless Steel. Features 1 x black and red circle design with a diameter of 12mm and a thickness of 2mm & 1 black purple circle design with a diameter of 12mm and a thickness of 2mm

Officially Licensed Naruto© & ™ x ©2002 Masashi Kishimoto / 2007 Shippuden x VIZ Media, LLC. This Officially Licensed Product is available only in UNITED STATES (INCLUDING PUERTO RICO & GUAM), CANADA, AUSTRALIA, NEW ZEALAND & UNITED KINGDOM.