Rohngall was silent for a few moments, and then he replied. “I see. Now, pray tell, what does that cigar have to do with everything you’ve got’?”
Rohngall was trying to buy time to ready his magic. But the instant he spoke those words-
Something burst through the side of his head. Everything was decided in an instant.

It was a wet- and blubbery-sounding explosion. The bullet decelerated as it pierced his cranium. Lead scattered everywhere, swimming in a sea of brain-fluid as it burned his mind away.

Instead of exiting through the other side of his skull, the bullet ricocheted around his brainpan, putting an instantaneous and permanent end to the old man.

And then even though he was quite apparently dead, dozens more bullets pierced his body, as if to deliver a final blow.
The bullets were not all fired from one place. There must have been more than a dozen marksmen situated at various locations.

Fate/Strange Fake, Volume 1, Extra