Cursed Seal of the Root Land

The Cursed Seal of the Root Land is a powerful cursed seal created by Seireitou Hyūga which naturally forms through the Amatsumikaboshi technique. When applied directly to an individual, Seireitou's influence on their darker emotions can become so great that his will seeps into them and starts to take residence within them. In response to this, a natural cursed seal forms on a location somewhere on their body to represent this action. It takes on a very subtle shape, appearing as a black bird-like figure with three bars on either side of its body to represent wings.

Doubling as a Puppet-Master Seal, this cursed seal spreads flame-like markings when activated and empowers the wielder by an incredible amount that is in direct proportion to their emotional state of mind. While they do start off with a significant increase, the more negative emotions inflict them, the stronger they become; making it possible for users of the cursed seal to reach nearly limitless heights in strength. it appears that the cursed seal chakra does utilize natural energy to some degree. However, the deeper they allow the cursed seal's influence to run, the stronger the hold Seireitou has over them. Those that bear the cursed seal are able to communicate with the fragment of Seireitou's will that exists within them, in the same manner a Jinchūriki communicates with their Bijū.

Trivia

 * In Japanese mythology, Soku-no-Kumi (根の国, "Root Land/Land of Origin") is the yomi ruled by the god Amatsu-Mikaboshi. It is a realm considered to be the parallel of heaven and reflects the bitterness of the goddess Izanami after she died giving birth to the fire god Kagutsuchi and ended up in the underworld where she eventually became its goddess; trapped behind a boulder that the horrified Izanagi placed there.