Clearly, despite Obito's wails, Itachi paid him no heed.
Fighting within Tsukuyomi's spacetime rapidly consumed chakra, so Itachi had not used a single ninjutsu from start to finish.
Although Susanoo did not rely on eye power, it still required chakra. But as the third power, its structure was not so easily broken down.
Though he had only heard about it, Adult Sasuke had once mentioned that, in his era, even the Infinite Tsukuyomi cast by Madara Uchiha after acquiring Six Paths power could not penetrate Susanoo's defenses.
As the Mangekyō Sharingan's ultimate ability, Susanoo itself represented the pinnacle of dojutsu, naturally granting it extremely high resistance to other dojutsu.
Most importantly, Itachi's Susanoo possessed the divine artifact known as the Yata Mirror, which could defend against every form of nature transformation.
Even without knowing what techniques Izumi possessed, Itachi did not need to worry too much about powerful attacks capable of breaking through the Yata Mirror.
The only thing he needed to guard against was Izumi's Daybreak.
After Obito relayed Izumi's abilities to him, Itachi had already made the most accurate assessment of the battlefield.
Yet Izumi did not seem to intend to activate that ability.
"Is she still planning to stall?"
"No."
As Itachi blocked Izumi's attacks, a little thought revealed the reason. "The activation condition for that dojutsu you said Izumi could use to break down techniques is probably the same as my Tsukuyomi. She needs to look at the technique itself."
"But Susanoo is enormous. Can't she just look straight at it?"
"Susanoo's power comes from the Mangekyō Sharingan and the caster's chakra, but unlike ninjutsu, it doesn't transform chakra's nature to give it physical form. If I had to make a comparison, the outer shell of Susanoo you see is more like a mass of highly