Okay, i want to be able to make a sword, that has a non-solid blade, that can cut through anything.
i want to make an energy sword, like the kind that zero from the megaman x games uses.
as i'm making a playable reploid race, including mavericks and maverick hunters
so i need plasma weapons
This is not really the place for a modding discussion, but:
I don't think that you can have anything that fancy in held weapons. You can
create "natural weapons", ie, weapons that are really bodyparts - those allow for fancier effects, but then can be cut off and don't work the same after that. "Feather" bodyparts pass through everything (or at least, when you attack feathers, you pass through THEM), so a feather podypart that has a ridiculous high standard temp might work. Failing that, you could harvest the bolt-spines of the plasma-beast for thrown "plasma bolts". (see: balor's fire
for an explanation of why this is an awesome idea)