“For me, now's not the time to brace your emotions. That's because my Master's about to be killed.”

“...Eh?”

Not even having the free time to doubt what he heard, Rider's next move was executed with lightning speed.

He threw the Sword of Cypriot he removed from the sheath at his waist overhead, which gave off bright sparks in the empty space.

After that, riding on ahead with a bird-of-prey-like agility despite his big size, with the sword which returned to him, he took a swift slash.

The sound of meat being ripped apart and getting wet. A scream of agony and splatter of crimson red blood.

With utter disbelief, Waver was staring at the black-clothed corpse which had fallen over.

When on earth did that attacker steal up behind Waver? And then, since when did Rider sense that presence? As for the thing Rider's sword knocked off just now, it was something the shadow clothed in black aimed and threw at him- a Dark dagger. With the throw of that dagger, Rider was able to finally ascertain the exact position of the enemy. Within the instant he did not expect, this bloodstained water tank had already become a battlefield.

However, above everything else, the thing which stared bewilderedly at Waver was a white skull mask of the dark shadow which fell due to Rider's decapitation.

“Assassin......It can't be...”

- Fate/Zero: Act 8, Part 3