Saber invisible sword

Despite that, according to observers, Lancer would appear to have an advantage with his incessant attacks, the truth was not so.

Lancer was as good as exhausted from fending off Saber’s attacks since they first engaged. Despite his taunts he was also powerless to change the situation.

For Lancer, who is capable of using his lance with just one hand, dual-wielding two spears, long and short, at the same time would enable him to attack both long-range and close-range. Taking account of the supremacy in weaponry, he should not have been forced into his current predicament by Saber and her single sword.

However —

How did the sword…

Lancer complained silently in his heart. It was not only the observing Irisviel that could not see the movement of the high-speed sword. Even Lancer, a Servant himself, could not discern the trajectory of the sword in Saber’s hands.

Lancer had no way of knowing. This too is one of Heroic Spirit Artoria's Noble Phantasms, the threat of Invisible Air • Barrier of the Wind King.

The air surrounding the sword was compacted together with immense amounts of prana, creating impossible refractions of light, rendering the sword invisible. Although it is not too much a support for the Noble Phantasm, its result was however very obvious in melee combat.

Saber’s opponent is attacked with an invisible sword, and the countering attack is similarly blocked by an invisible sword. Lancer’s worry was understandable. Even though he could decipher Saber’s attacks by her movement, he could not make surprise attacks on her due to the inability to see the length of her blade.

Therefore Lancer can only approximate things and keep himself outside of Saber’s range. Also, only then can his magnificent continuous attacks be used to their full extent. Despite him being able to block all of Saber’s attacks, he had yet to find an opportunity to deal her a lethal blow.

This woman, is quite good…!

Facing the enemy that he had just met, knowing the time had come for him fight with his life, a sad smile emerged on Lancer’s face.

- Fate/Zero: Act 3, Part 4