Cursed Seal Device

These devices are embedded with a juinjutsu created by Tosaka, which bestows the wielder heightened abilities, capable of making an individual with no ninja training strong enough to defeat those of a genin rank or higher. Tosaka claimed his device (created from the data on Jūgo’s Sage Transformation) to be the “ultimate Cursed Seal weapon”, prior to his utter defeat from Jūgo’s complete transformation.