The GM88, or Geistmesser 88 (Ghost Knife 88), is the standard-issue combat knife of the Belkan Waldreich's Wehrmacht. It has an extremely sharp blade, which is about the width of a sheet of paper. The blade is woven from multi-walled superhard phase carbon nanotubes, made from graphene particles. Due to the composition, the blade has the dull metallic luster of graphite. The blade does not need to be sharpened, due to the properties of the nanotube structure.

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