"Chakra can sustain a spiritual mark because that chakra is his own creation."
"Someone else's chakra would constantly erode his spiritual mark."
"Unless..."
Hashirama touched Minato's gradually dissipating Hokage Haori.
The next second, gentle chakra brimming with vitality poured into Minato's fading body.
Amid the green light, Minato's figure grew solid again.
"This..."
Minato looked at Hashirama in surprise.
Such an ability was simply unheard of.
If a spiritual mark alone could let someone survive in the Sealing Space indefinitely, wouldn't death lose its meaning?
But Hashirama's methods had broken through that restriction.
"Yahahaha, don't be so surprised."
Hashirama scratched his head.
His chakra was highly accommodating, but he had to consciously control it.
Before researching Impure World Reincarnation, Tobirama had studied the feasibility of spiritual marks and asked Hashirama to help.
In the end, he discovered that Hashirama's chakra had this effect.
But only Hashirama possessed this ability, and Tobirama's original intention had been to protect Konoha in the future.
If my big brother were still around, what the hell would I need a spiritual mark for?
So Tobirama halted the research, leaving the records in Konoha's archives.
Later, a certain snake who just happened to accidentally slip out of Jiraiya's house into the Hokage Building, just happened to find the archives, and just happened to pick up those records discovered them.
Combined with Orochimaru's own research, they became the Cursed Seal.
Then again, although Tobirama's research had stopped, Hashirama was right here, alive and well.
Putting a little thought into preparing some chakra for Minato was no big deal.
Hashirama: "Piece of cake."
Naruto happily hugged Hashirama around the waist. Hehe, his teacher really could do anything!
Kurama haughtily turned his head away.
Although he still rather disliked Minato, the man was Naruto's father, after all.
He was