Volblade

Volblades are enchanted swords with edges hotter than molten tungsten that can cut through anything.
"...They all roared as the Gremlin (Salus) yelled with his sword held high; a mighty longsword it was, and as he raised it over the camp it cast a hot bright sapphire light. It was a magical sword, a Volblade with edges lined a burning blue; a glowing strip that outlined the blade like a wire of neon light. He continued with the flair of a pirate waving the blade, and when he walked there were streaks of blue trails left behind as he swept his sword through the air..."
– Tales of Salus and Gale
Also: Volsword