Caliburn

"Myrlyn, it has been a very strange day." Aurthur tossed a bag at my feet and sunk the tip of his sword into the ground before him. "In there you'll find a..." he rubbed his chin "I-dont-know-what. I just killed it about ten minutes ago."

I opened the bag and took a look at a dark blue-black imp-like creature. I'd never seen anything like it before. It had been hacked cleanly in numerous places.

"I think the thing's been spying on us. I never would have caught it if I hadn't had this." Aurthur patted the hilt of the sword.
"How so?"
"Well, I found it this morning, stuck in the sand just like this. There's no one around who could be it's owner. I figure it's discarded. Too bad. It's an excellent sword. Better than..."
"Aurthur, how did it help you catch the imp?" I interupted
"Oh well, It alerted me somehow. I was walking near some bushes and the next thing I knew I was swinging at the underbrush. The first stroke darn near killed the thing. What is it?"
"I think you're right about it being a spy. I think the creatures from the moons are watching us."
"The moons, huh? That explains it."

Caliburn
With a blade exactly 60 inches long, Caliburn, as I've come to call it, is much lighter and stronger than any sword of it's size. It even holds a sharper edge and dulls much slower than other swords. When Aurthur first discovered it he used it as a greatsword, but I dismounted the long two handed hilt and replaced it with a perfectly balanced one handed hilt with a guard. I told him the he could use the lightness of the weapon better as a one handed weapon. I showed Aurthur how to use the longsword to parry and thrust. Eventually he learned all the fencing techniques and absorbed them into his normal slashing style.