"What is this? A glass ball?" Uzumaki Shinmen suddenly widened his eyes. "I know this! Cloud Hidden Village has these—light bulbs that can glow!"
Shinmen had a long scar across his abdomen, left behind when the Cloud ninja had operated on him. Before him was a bright light bulb, while inside his stomach were foreign objects like Cloud ninja fingers and surgical tools. It caused him unbearable pain.
"That's right. This is a light bulb—a Tungsten Filament Light Bulb."
Minato showed Shinmen the base of the bulb and said,
"Shinmen, let's try researching a Sealing Technique that seals Lightning Release chakra into a talisman.
Then we'll create a chakra outlet on the talisman. As long as it touches a conductor, the talisman will slowly release Lightning Release chakra, turning it into a weak electric arc to power this light bulb.
We'll use the Sealing Technique you just performed, along with your Lightning Release chakra."
Minato had learned some Sealing Techniques, but he did not possess Lightning Release chakra, so they would mainly have to rely on Shinmen.
Uzumaki Shinmen said,
"I've learned the Five Elements Seal, but I've only just begun.
The Uzumaki Clan Sealing Technique scroll Zhuyin JieJie gave me says that our clan's Sealing Techniques are mainly divided into two types.
The first is physical Sealing Techniques, represented by the Four Symbols Seal. They can seal large objects inside talismans."
Minato nodded. In the original story, Minato Namikaze had sealed the Nine-Tails using the Eight Trigrams Seal, which consisted of two layers of Four Symbols Seals.
When Shimura Danzo died, he had used the Reverse Four Symbols Seal to seal an entire bridge, trading his life for the bridge. The principle was also that of a physical Sealing Technique.
Ordinary Sealing Scrolls also used the Four Symbols Seal