A veteran of the ninja world: surviving from the Six Paths of Heroes to Boruto

[Eternal Life Flow]
"How many years have you been playing in the ninja world? I've existed since the Sage of Six Paths established the Ninja Clan!"
I was there when Kaguya was defeated, I was there when the Six Paths established the Ninja Clan, and I was still there during the battles against Indra and Ashura...
Having witnessed the vicissitudes of life, I sit back and watch the battles of the ninja world unfold.
Although I don't take action, my legend lives on throughout the ninja world.
Time may cut down the proud, but I dare to challenge it!
I am the one who knows everything in the ninja world, a true immortal being!
------
"Let me see how old you were when you entered the ninja world."
"Oh? He's already a hundred years old? That really gave me a big surprise!"
"Let me give you some figures to illustrate just how formidable the seniority you're dealing with is..."
"My age in the ninja world is... 5000 years!!!"