Here’s another lightsaber: One of Nolat’s Twin-sabers.
At first glance, this might look like an ordinary Saber staff, just with a shorter hilt. However, it is not. A normal double bladed lightsaber is essentially two separate lightsabers connected to each other. You can ofter use it as a single lightsaber, or even split it apart to dual wield it as two separate lightsabers.
The Twin-saber, on the other hand, does not have that option. Where most double bladed lightsaber have two separate kyber crystals, this one only has one. Because of this, both blades will simultaneously ignite when it is turned on. If you only want one blade, you’d have to rebuild the lightsaber entirely. It is essentially closer related to a crossguard than a saber staff. Just instead of two small side emitters you got one larger one at the back.
This all makes a Twin-saber extremely dangerous to wield. The only character currently wielding it is Nolat Thrad, a Twi'lek character who will eventually show up in Ronin’s Path.
Oh and if you thought one Twin-saber was dangerous enough, imagine using two of them at the same time…

(and yes, the Twin-saber is my own idea. It isn’t a canon concept, as far as I’m aware)

