Volumen Hydragyrum

The Volumen Hydragram (月霊髄液) is the strongest of the Mystic Codes that Kayneth Archibald El-Melloi carries in the fourth War of the Holy Grail. It is the battle tool that Kayneth has the most proficiency in, as his forte is the manipulation of fluids. Its weight can go up to 140kg.

With 10 l. of mercury manipulated through magecraft, it has the ability to search, attack and defend. It can attack with the shape of a whip, a spear or a blade that rotate freely, sharper than a razor; like a current of hyper high pressure, it can even cut through titanium and diamond.

However, as the attack of the whip or the blade relies on centrifugal force, the power is at the base, and none on the extremity; thus, knowledge of close-combat allows an opponent to read through the orbit of the attack.

the defensive mode is automatic, reacting immediately to anything that can harm Kayneth, protecting him with a thin, hyper hard membrane steretching around him. A membrane of 1 mm thick as rigid as steel can defend him even from a claymore land mine, and of course, from the destruction of the Hyatt hotel. Even if the user is unaware of the threat, it will react by itself.

However, it will only dispatch the optimum power to defend against the immediate threat, thus applying more power than expected allows an attack to break through it.

In hunting mode, tentacles with high sensitivity will stretch out from the main body, examinating the vibrations and the pressure of the atmosphere, even searching for sound or heat sources.

Yet, as it has no sense of vision, taste or smell, it is possible to deceive it if it cannot recognize the heartbeat, breathing and body temperature as that of a human.

Source: the dictionary resource at Jonnobi.