When Shiro heard the Noble Phantasm Achilles had unleashed at the very end, he knew he had lost.
Granted, Achilles had burned through a lot by releasing so many Noble Phantasms in a row, but Shiro's own consumption had been even worse.
Projected Noble Phantasms were only the smaller part. The real mana guzzler was still the state technique known as "Bankai."
Bankai was one of Shiro's applications of Magic Resistance release, converting an attack method originally biased toward pure magical energy into a way to amplify the body.
It was a method of use completely different from Mordred's Crimson Lightning and Artoria Pendragon's Infinite Beam Cannon.
But just as Artoria Pendragon needed the Holy Grail's infinite mana to fire Infinite Beam Cannon endlessly, Shiro's prerequisite for this was extremely high as well. First, his physical qualities had to be developed to the limit!
In other words, all three of his actual panel stats had to be A!
Only then could he control that berserk power. The current Shiro could only achieve that after his stats were raised by Projection-related Noble Phantasms.
The second condition was that this move would consume all of Shiro's magical energy, including the energy stored in his crests. That would cause Shiro's combat power to plummet, which was also why he had not used it against Madara back then.
Once he used it, he could only win, not lose. There was no fallback whatsoever.
Unless one day Shiro's use of Mana could match or even surpass his own Od, this move was destined to never enter a life-or-death battle.
Wasn't throwing Noble Phantasms around and using Phantasm Break way better?
Unfortunately, that move was useless against Achilles. Only attacks bearing Divinity and Divine Constructs could wound him before Dromeus Komētēs was nullified.
Shiro lowered his