Unlike the Third, Tobirama possessed both the Third's kindness and Danzo's darkness.
Because darkness lurked in his heart, he deeply distrusted people like Orochimaru and Hiruko, who had crossed the taboo of human experimentation.
Yet he could not do without their exceptional Research Ability, so he implanted Flying Thunder God marks into Orochimaru and Hiruko.
The Flying Thunder God mark had one characteristic: once implanted, it would remain for life unless removed with Yin Yang Release.
Yin Yang Release was the Kekkei Genkai of the Six Paths Sage, not something ordinary people could learn.
Seeing the Flying Thunder God mark on Orochimaru's body, Hiruko's face turned shades of green and purple, looking utterly terrible.
He had thought that after clearing his name, he could return to the right path, but Tobirama had regarded him as just as much of an unstable element as Orochimaru.
Having a Flying Thunder God mark implanted was equivalent to having his life and death held in Tobirama's hands.
As long as Tobirama lived, he would be a nightmare they could never escape!
Hiruko looked at Orochimaru. "Orochimaru, you have the White Snake Sage behind you. The White Snake Sage has the ability to remove Tobirama's mark."
"Why don't you ask the White Snake Sage for help?"
Orochimaru let out an evil chuckle. "Because my life is also in the White Snake Sage's hands. It happened the last time I went to Ryūchi Cave to capture Liao Wu."
"Ah?!"
Hiruko stared at Orochimaru in utter shock. Was Orochimaru really that popular? The White Snake Sage wanted to control him, and so did Tobirama.
Compared to him, Hiruko was actually rather fortunate.
At least Tobirama's Flying Thunder God mark was merely a warning. As long as Hiruko did not do anything excessive, he was still quite free.