Board Thread:Boruto Discussions/@comment-1512913-20180921122751/@comment-1512913-20180921142210

Noticed the similarity, but I don't think Momoshiki used Kama, since there was no visible seal anywhere. Not to mention the powers of his Rinnegan were pretty much almost identical to Kama, so having it would be pointless. If I were to guess, Jigen killed Urashiki and got Kama.