"What - ?!"

Even so, Caster still made a sound of shock. It wasn't just the blow of wind which penetrated the ranks.

When objects move extremely quickly in the atmosphere they are capable of tearing apart the air in front of them, while leaving a vacuum behind. Of course, that vacuum would draw in the surrounding air, and become a surge that follows the object which passed through it. There are techniques in autoracing that allow cars to follow right behind the car in front of it, using that 'slipstream' to accelerate faster.

The air pressure resulting from the release of Saber's Invisible Air triggered a similar phenomenon. It created a vacuum behind the passing gale at the same time it destroyed the army of demonic monsters, and prepared a point of in-rushing air.

Then, the one who sprang into this converging surge without hesitation was the one who was waiting for this one strike – Lancer.

"Come - prepare yourself!"

It was an ultimate skill that not only demanded superhuman physique, but complete synchronization with his partner. However, Lancer achieved this miraculous combination with watching his enemy Saber using the secret sword of wind for just once.

With one leap Lancer passed through the passage twirling with gales of blood and flesh, like a swallow that tucked in its feathered wings by its side as it chased the wind. When his feet once again touched earth he was barely ten strides away from Caster, with no obstructing barriers between them.

"I have you, Caster!"

"Ahhh!?"

The demonic monsters that turned around due to their master's crisis stretched their tentacles together towards Lancer's back. But Lancer didn't turn back. He brandished the short spear in his left hand behind him like a windmill to cut down the pursuing attacks, while he turned half his body and approached Caster with the long spear in his right hand extended.

He was just short of the killing blow. The long spear's strike only resulted in the tip cutting slightly into the surface, and didn't make a serious tear.

But the Noble Phantasm in the enchanting spearman's hand was such a weapon that would decide the victor on the battlefield even with such a slight touch.

"Gouge, Gáe Dearg!"

His growl was followed by a crimson stab. The tip of the spear did not touch Caster’s fragile body – but the cover of the grimoire in his hand.

That is the red spearhead which once penetrated Saber’s Invisible Air and canceled out her magical armor. It is a fatal "Noble Phantasm killer", capable of severing all ties of prana. For Caster, who completely relied on the mighty power of the grimoire to summon demonic monsters to manipulate, it was a decisive blow equal to a checkmate.

"Boom", a sound akin to waves breaking against rocks beside the sea echoed in the forest.

The countless alien demonic monsters on the ground all liquefied in the blink of an eye. The demonic monsters, which were originally created from the flesh and blood of the sacrifices, changed back into blood and scattered away. They lost the power to materialize into being the moment the prana supply from Prelati's Spellbook was terminated.

Within the rapidly retreating Caster’s hands, the grimoire immediately activated its ability as a prana furnace and quickly regenerated the damaged cover. The prana was only cut off during the brief moment when Gáe Dearg’s blade was in contact with the grimoire; the spear had no power to damage the Noble Phantasm itself. However, once canceled, the magecraft can’t be salvaged. Even if he wanted to repeat the summoning spell, Saber and Lancer’s holy sword and twin spears wouldn’t give him the time either.

"You bastard- BASTARD bastard BASTARD bastard BASTARD BASTARD BASTARDDDDDD!!"

- Fate/Zero: Act 7, Part 2