Looks like he really was a genius!
Senju Tobirama gathered his thoughts, his expression growing serious. "First, use that Binding Technique you developed on me!"
As he spoke, Senju Tobirama raised a hand and formed a clone with the Shadow Clone Technique.
His real body was in a spiritual state and used Genma's chakra, but the Shadow Clone he created was tangible, with a physical body that could serve as a target.
Genma formed the Tiger hand seal and cast Demonic Illusion: Spider Binding, locking Senju Tobirama's Shadow Clone in place.
Senju Tobirama's clone only stiffened for a moment before breaking free of the genjutsu.
Genma couldn't help but look surprised.
It was the first time anyone had broken free of this technique.
He hadn't faced many opponents before, and the strongest among them was his teacher, Hatake Sakumo.
Hatake Sakumo wasn't skilled at casting genjutsu, but he was an expert at dispelling it.
Then there was Tsunade. She wasn't much good at casting genjutsu either, but she was very skilled at breaking it.
And neither of them could dispel this technique.
Senju Tobirama had broken free in the blink of an eye. If they'd been farther apart, it might not have affected him at all.
But when Genma thought about Senju Tobirama's record, he understood.
After all, even Uchiha Izuna, with his Mangekyo, had been unable to use genjutsu to hold Senju Tobirama in place.
Senju Tobirama was surprised, too. "You have your elder brother's cells inside you—no, not your elder brother's cells."
"That's some impressive chakra!"
Senju Tobirama felt he might have sensed it wrong, and Genma's chakra reserves surprised him a little as well.
After dispelling the clone, Senju Tobirama received its memories and sensations, and was surprised once again.
This child's Yin Release was powerful—powerful enough