Indeed, the power displayed by the three Servants in battle was no less than that of modern weapons.
It was even superior.
After all, this level of combat might have been Lancer Diarmuid's full strength, but it was not yet Artoria's or Ailin's full strength.
The reason it could be called Lancer Diarmuid's full strength was that the two spears he wielded after manifesting as Lancer were both anti-personnel Noble Phantasms. Though powerful, they could not cause widespread destruction.
Meanwhile, the Excalibur in Artoria's hand was a genuine anti-fortress Noble Phantasm. Once she released its true name, a single strike could raze this harbor to the ground.
The same was true for Ailin.
He even possessed a powerful Zanpakuto capable of destroying the entirety of Fuyuki City.
Parameters, skills, and martial prowess guaranteed a Heroic Spirit's lower limit.
But the strength of their Noble Phantasms determined the upper limit of a Heroic Spirit's power.
Take Gilgamesh, the King of Heroes. In terms of parameters, skills, and martial prowess, he was not the strongest.
But why was Gilgamesh considered the ceiling of Heroic Spirit combat power?
Because Gilgamesh possessed the strongest Noble Phantasm, Ea.
It was a powerful Noble Phantasm capable of cutting apart the world and returning it to chaos.
Of course, the magical energy required to achieve that was far beyond what Gilgamesh himself could provide.
Even so, Gilgamesh could still rank among the strongest Heroic Spirits with an Ea whose full power he could not unleash.
Naturally, compared to Magi like Irisviel, the combat power displayed by Ailin, Artoria, and Diarmuid was no weaker than the destructive force of a modern nation's military.
Even if a modern nation's military tried to subjugate Servants, they would likely suffer heavy casualties and gain nothing in the end.
After all, although