A barrier ninjutsu technique performed by all of the Sound Four, used during the temporary "death" of those advancing their cursed seal to its second level. The seal confines them in a coffin while the process takes place, and does not even allow the Byakugan to see inside.[2] The Dark Sealing Method can be used for an additional layer of protection. The seal seems to be naturally lifted once the cursed seal has advanced to level two.
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