The blow was so fast Raynor couldn’t see it fully — he saw the protoss leader’s arm slam forward in a blur, fist leveled at the Dark Templar’s chest, but even his armor’s targeting system couldn’t clarify the image properly. It was simply too quick, too sudden. He thought he felt a rush of air from the punch, even here on his ridge, and knew that the impact would crush the Praetor’s chest like an eggshell.

But by the time the punch landed, the Praetor was no longer there.

If Tassadar’s move had been lightning-fast, Zeratul’s response was as quick as thought. There was no blur, no sense of motion — the Praetor was simply two feet to the left of his former position. It had happened in less than a blink, and Raynor’s eyes twitched trying to adjust even as his brain registered the Dark Templar’s change in position. It hadn’t been an illusion, either, like the one Tassadar himself had used against Kerrigan. Raynor was sure of that, though he couldn’t say why. He just knew that the Praetor had been facing Tassadar an instant ago, and now he was off to one side.

-Queen of Blades, Chapter 15