Melee Modifications:

1.   Plasma Blade: This modification can only be added to slashing or piercing weapons melee. Plasma blades deal +7 points of Heat damage, which does not stack with any bonus damage from the weapon‚s material. Plasma weapons cannot be parried or blocked except by weapons or shields that can defend against energy attacks. Plasma blades can be used to parry energy weapon attacks (with the proper techniques, of course). Plasma blades cost one hundred times as much as the original.
2.   Sonic Weapon: This modification may only be added to slashing or piercing melee weapons. Sonic weapons vibrate at hypersonic frequencies. They make a characteristic loud and sharp screech whenever they hit anything (listen DC of -1). At the point of contact, they become superheated. Sonic weapons deal +5 damage, but cost ten times as much as the original weapon.