Of course, Lord El-Melloi would not fall for the same trick twice.

“Fevor, mei sanguis!”

The mercury’s defensive form activated immediately, but this time it wasn’t a membrane. Volumen Hydrargyrum leapt in front of its master and formed countless spikes from the floor to the ceiling. It was like a thick bamboo forest covered Kayneth’s entire body, and at the same time completely blocked all the bullets flying near.

There’s no need to use a membrane as defense if he wasn’t facing an attack such as flames or mist. Things such as bullets would become harmless as long as it is not allowed to move in a straight line. Thus, using only “columns” to defend would be enough.

Of course, the prana needed to expand the mercury into a mountain of swords isn’t even comparable to that used to form a membrane. Every single spike, twirled as thin as a steel wire, had to be equipped with all the strength and malleability to deflect bullets. The automatic defense this time was completed using all the prana Kayneth had in his possession. The inherited Magic Crests of the Archibald family on his shoulders circulated to its ultimate limit, creating extraordinary pain to the practitioner.

It could be said that the defense this time was the true impregnable fortress.

- Fate/Zero: Act 7, Part 3