Transformers Star Saber by DR.WU (TF-Prime / Prima The 13) BLUE version.

Transformers Star Saber by DR.WU
Translucent Blue Blade with silver hilt. 
Detachable end to be fitted into closed fist peg hole. (Approx 5mm)  

Wielded by Prima, one of the original thirteen Transformers at the dawn of time, the Star Saber sword was a weapon unlike any other. Though several other swords throughout the multiverse share its name, only one could snuff out stars and crumble the stuff of planets into dust. Many legends swirl around this blade of blades, from its origin to its precise nature to the circumstances surrounding its disappearance into the annals of history, but somewhere between fiction and fact, the Star Saber waits to be discovered again by one worthy enough to wield its power...
(Information from TFwiki.net) 

Please note this is a 3P item and may differ from images shown.
Optimus Prime figures and the other sword are not included.
The other Matrix swords are available on site.