Quakeblade

"I acquired this sword after defeating a group of rivals outside the walls of Keldabe on Mandalore. I never fully mastered the use of it, so it doesn't have much significance to me. Be careful, it's not nearly as sturdy as your typical vibroblade."

- Naastau while selling the Quakeblade to the Invisible Market

The Quakeblade (Mra'kal in the Mandalorian language) was an ancient Mandalorian vibrosword wielded by Mandalore the Indomitable prior to the Great Sith War. The weapon was eventually captured by a rebellious Mandalorian clan, who stored it away in an underground vault outside the city of Keldabe. During the Great Clan Wars, a group of warriors retrieved the Quakeblade from the vault, whose leader went on to use it in his future raids. When the group was nearly wiped out in an engagement with Naastau's warband, Naastau claimed the sword for himself. He later sold the sword to members of the Invisible Market.