This weapon ability can be achieved by using a "Lipstick". It enables the user to create a laser sword, whick is much lighter than a normal sword and is easy to wield. It doesn't decrease the speed of the user either. While this ability can be used by all classes, it doesn't get affected by the original ability of the user.
A different version of this weapon ability can be achieved by using a "Haurbrush". Compared to it's successor, the Hairbrush does get affected by the user's ability; the more powerful the user, the bigger and more powerful the laser sword becomes.