Torao Senju- The Surgeon of Death

Follow the story of a war orphan raised by a legendary Sannin as he becomes the next greatest Medical nin of all the five nations. Except he's as efficient in taking lives as he is in saving them. MC is Trafalgar Law from One Piece in a Naruto setting. He will develop jutsus similar to the Ope Ope no Mi. Eventually overpowered but there will be stakes and challenges.