The shapeless mercury, can also be sculpted into any shape –

"Scalp!"

As Kayneth yelled, a part of the mercury ball suddenly became a long and thin ribbon extending upwards. Then, the mercury ribbon savagely thrashed towards the door like a whip.

As it was about to hit, the mercury whip suddenly compressed itself into a thin edge of only a few millimeters thick, becoming a mercury blade as sharp as a razor. Attacked by this mercury blade edge, the heavyset bolt was cut in half as smoothly as if it was a piece of tofu. The great gates collapsed inwards with a heavy groan.

Mercury is a heavy liquid in room temperature; when it moves rapidly under high pressure it would possess a mighty kinetic energy. Moreover, mercury can change into shapes such as whips, spears, and blades at will. Its sharpness can even overwhelm laser rays, rivalling pressurized water jet cutters.

Perhaps he carries with him the confidence of an assured victory. Because, in front of Lord El-Melloi’s Volumen Hydrargyrum, even the most stolid defense won’t stand a chance. Be it titanium alloys or diamond, nothing is unbreakable.

- Fate/Zero: Act 6, Part 4