Sometimes, it might require a hero with a unique ability or a sacred artifact. The hero could use their power or the artifact's magic to convert the blood water into healing water by channeling positive energy or performing a special ritual.
Physically, he might gain new powers or abilities as mentioned before. But there could also be negative effects. His body could reject the foreign blood, leading to internal pain and weakness.
Perhaps in this fanfiction, Naruto is in a situation where he has no other source of sustenance. He could be trapped in a desolate place with no food or water, and the blood becomes a last - resort option for survival. This would be a very dark and extreme take on the character, as it goes against his usual values.
The 'Blood in the Water' is often related to the 1956 Melbourne Olympics water polo match between Hungary and the Soviet Union. It was a very intense and politically charged game. Hungary was facing political unrest due to Soviet influence at that time. The match became a symbol of Hungarian resistance, and the aggression during the game led to the term 'Blood in the Water' as players were literally bloodied in the pool.
Well, 'Blood and Water' is indeed based on a true story. This fact gives the story a sense of authenticity. It allows the viewers to connect with the characters and their situations on a deeper level, as they might be inspired by real people who have faced similar challenges.