Ah! it is Swordtember again. Nice. Looking forward to seeing what you come up with this year.

It is indeed :D

This blade reminds me a little of weapons a character of mine is wielding: Two ancient daggers forged from metal that was folded many, many times and embedded within the blade like a thread in cloth is a delicate crystal lattice which, when in contact with magical energy causes two things to happen: Firstly the lattice flashes to bright luminescence and engulfes the wielder in what appears to be St. Elmo's Fire, and secondly it creates the magical equivalent of a short circuit and hurls the energy it came into contact with straight back at its source - to devastating effect.

This one has actual variants, I'll post them later!

You could name it Slugbane.

oh noooooooooooooooooooooooooooooo