Board Thread:Theories and Speculation/@comment-30918569-20190328154604/@comment-39205976-20190420220652

Letting aside their origins, which we can't speculate nothing yet about, their goal may be finding vessels in order to preserve their conscences through time. More simple, they are looking for a body-replacement for Jigen, who is not an ordinary man but is on the verge of death, just like the time Orochimaru can stay in a body before replacing it. 'Karma' could be a test to see if Kawaki's body can support Jigen's will and power, just like Orochimaru tested candidates with his Curse Seal. Naturally, this would mean that even Boruto is a possible candidate, if not for Jigen, for Momoshiki's soul. By Jigen's words, it would be the more accurate possibility. However, for the path this arc is leading into, it would not be more different from when Orochimaru tried to take control of Sasuke's body. In the end, Jigen will be destroyed by Kawaki or Boruto in his try to take possess on one of the two boys. Or, even more difficult, the Kawaki we saw at the beginning, the one in the future vs Boruto, is Jigen inside Kawaki's body, but I don't think Kawaki will lose in a confront of will with Jigen, not after Naruto's training.