| abstract | - The HF blade was used predominantly by the Cyborg Ninjas Gray Fox, Olga Gurlukovich and Raiden, though it was also employed by Solidus Snake and the Arsenal Tengu. The HF blade also saw high usage among soldiers during the 2010s, as several cybernetic bodyguards were seen using them to cut down enemy soldiers in 2018. The late 2010s saw several advances to high-frequency cutting technology. One was the invention of the HF machete, used frequently by normal soldiers of Desperado Enforcement LLC. Raiden's HF Blade was upgraded by Doktor to absorb MCFC electrolytes from his opponents as he cut them, and these would be fed directly into Raiden himself. Samuel Rodrigues' HF blade was designated as a "VT7 high-frequency blade", but the fact that its efficacy depended on the original blade's quality suggests that the designation actually refers to the HF oscillator. The VT7 also had ID lock capabilities that included a timed unlock function. Existing weapons could also be modified as HF blades, as evidenced by Sam's HF blade, which was originally a Murasama blade dating back to the 16th century, as well as the LQ-84i's chainsaw weapon. In these cases, though, HF Blades' cutting power are amplified. HF blades could also be equipped onto war machines. They were also extremely durable, Raiden's being able to parry a chainsaw with no visible damage to the sword, as well as being able to block Metal Gear EXCELSUS's giant blades. They also appear to have some quality that allows them to cut things that are longer than their length, as shown when Raiden and Sam both cut a Metal Gear RAY in half, lengthwise. Although HF Blades were normally metallic in nature, not all are, as some HF weapons could also be made entirely of wood so long as it was naturally conductible for the process. For instance, an HF wooden sword required Honduran mahogany to create, as it was a natural conductor for HF properties.
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