The Orochimaru-style Substitution Technique was indeed miraculous, but the amount of chakra it consumed was equally astounding.
Its effects were excellent, even capable of completely erasing near-fatal injuries, but the price was too steep. It could only be used as a life-saving secret technique at critical moments, not as a conventional ninjutsu.
Having revealed another trump card, Sasuke Uchiha found himself in an increasingly dire situation. At enormous cost, he had finally created an environment where he could face Shimura Danzō one-on-one.
How could the battle-hardened Shimura Danzō possibly miss such a perfect opportunity, when Sasuke's old strength had been exhausted and his new strength had yet to emerge?
Sasuke was still considering his next move when Shimura Danzō used the Body Flicker Technique and appeared before Sasuke Uchiha, who had just emerged from the Orochimaru-style Substitution Technique. His pale right arm seized Sasuke by the throat. That powerful arm and crushing grip were nothing like those of an elderly man.
His tiger's mouth gripped firmly, clamping around Sasuke's throat like an eagle's beak and tightening continuously, making Sasuke's neck creak.
Realizing something was wrong, Sasuke tried to swing the swords in his hands at Shimura Danzō, only to discover that he had lost control of his body.
Pitch-black patterns appeared across Sasuke's cheeks, neck, palms, and arms. His entire upper body was bound by these suddenly emerging markings.
"The Self-Exerting Curse Binding Seal. With your current strength, breaking free will probably be difficult. But before that, I'll be taking your eyes."
Veins bulged across Sasuke's face as he lay unable to move, able only to watch Shimura Danzō's left hand approach his eye.
Driven by an extreme desire to survive, the power of the purple Susanoo once again surged from Sasuke Uchiha's dried-up body. A massive arm came crashing