Naruto: Immortality Achieved After Unifying the Shinobi World

My name is Xia You. I transmigrated to a space-time matrix composed of seven major parallel Naruto worlds. The system prompts that as long as I complete the unification of the seven Naruto worlds, I can become an immortal on the spot, eternally undying. The task difficulty is very high, but fortunately, I can cheat a little. So I decided to take Hashirama to see how Tobirama dies. Take Lord Madara to see how he gets his heart ripped out by Black Zetsu. Take young Hiruzen to see how he's taken down by Orochimaru. Take Minato to see how Naruto suffers exclusion. Take Tobirama to see how the Senju and Uchiha clans go extinct. Maybe even grab Boruto to come back and see the prime form of Fourth Great Ninja War Naruto?