Preta Seal

A seal devised by Yūmei Kokūzō, it allows those bearing it to utilize ninjutsu without having their own chakra or that of their techniques absorbed by the gargantuan Blocking Technique Absorption Seal that exists outside of Konohagakure. This seal's design may not be mimicked, even the most skilled juinjutsu-users would not be able to match its design, which despite appears to be just as simple-looking as any other seal, possesses hundreds upon thousands of miniature markings that make up its visible form.