The Darksaber. That was a big deal. And again that was an idea that came straight from George. Originally what Pre Vizsla was carrying was something in the EU called a vibroblade; it's kind of an electric sword. George let me get away with it in the early phases of design and in the early shooting, but when the color came back and he was watching the lightsaber we want to have combating this vibroblade, he said there's no way that can happen; there's no way that a non-lightsaber could block a lightsaber. So he had us do away with the vibroblade in that episode really late in the game, and he created something called the Darksaber, which would be a black-bladed energy saber with a white edge. It has a crackle of electricity; it's kind of like a more ancient version of a lightsaber, and it's inferred in the episode that it's really one of a kind and that Pre Vizsla's ancestors stole it from the Jedi in the days of the Old Republic. So it's got all this neat history attached to it right away, and it sounds different.

Dave Acord and Matt Wood, we designed a special sound for it when it's fighting a lightsaber. It hums differently; it sings a little more, like a tuning fork. Also, a lightsaber if you look top down on it, it has a round blade all around; it's an energy beam. The Darksaber is flat like an actual sword, so it's thinner on one side and it's wider when you turn it. It's a really interesting thing that George created for the Mandalorian to carry in the episode.

Dave Filoni

This lightsaber was stolen from your Jedi Temple by my ancestors during the fall of the Old Republic. Since then many Jedi have died upon its blade. Prepare yourself to join them!

Pre Vizsla

It's interesting, because I want to know that there was any difference between a lightsaber and the Darksaber ?

According to Filoni, there is none, and Lucas himself created it in order to match it with the power of the lightsaber, because a vibroblade wouldn't work.

Let's see how destructive really is...

It can cut down the Steel Blast Door just as easily.

It can slice a Metal Staff just as a Lightsaber would.

It can slice a flesh without losing any speed, just as a Lightsaber.

Against the Lightsabers.

Against the Droids and the Clone Troopers.

Deflects a Blaster Shot just as easy.