The weapon is a major part of Mandalorian lore, and has featured in various other Star Wars stories, including the animated series The Clone Wars.
Well, according to Esposito, the Darksaber will play a big part in The Mandalorian season 2.
The last we saw of Esposito’s villainous Moff Gideon character, he was emerging from a downed spacecraft wielding a very mysterious looking weapon, the Darksaber.
“You’ll see more of the Darksaber, you’ll get the explanation of this ancient weapon to the modern world, a collapsed world.