Originally posted by Gideon
Go ahead, my young apprentice(s).
Very well I shall start the Exar Kun discussion by stating what we know about him and we will go from there.
He was a lightsaber prodigy, he defeated his master as padawan just after dueling Sylvar,Crado and after losing the first part of the duel against Vodo. In the duel he managed to break Vodo's staff which the narrator states (in the first part of the duel) by using the force Vodo can make it "more powerful then Kun's lightsaber" Vodo also says that Kun is his "most formidable student" he has ever had. I believe Vodo was about 400 years old and Kun notes his master has been "respected for centuries," thus indicating the amount of time Vodo has been part of the order. Ulic Qel Droma (who he himself was extremely gifted in lightsaber combat) could not gain the upper hand in their duel before it was interrupted.
Now in regards to his double bladed saber. While there is some controversy going on if he invented it by himself, we do know that no one else since him used a single bladed hilt and unlike any other dbl, his was also a dual phase lightsaber. Regardless if he did create the dbl, he style imo was still unique compared to others dbl wielders for the reasons mentioned above.
He also seems to be somewhat physically strong too as he was able to after repeated hits from his lightsaber to cut through mandalorian iron and he lifted the republic's chancellor into the air with one arm.
Kun was also powerful in the force. He is gifted in sith alchemy and created numerous types of beasts such as terentateks. He was able to drain the life force out of the massassi race so he can escape death. He can obviously use his amulet( aka force blasts) to destroy anything in his path.
He was able to freeze the entire Galactic Senate. He is also gifted in sith magic as he was not only able to resist Aleema Keto's "force blast" (name given to the attack by wookieepedia) and returned the favor with his own force blast. Kun was able to resist Odan-Urr's wall of light technique which the latter used effectively on ancient sith. and kill him with a waive of his hand. There is also a quote in JvS (I don't have access to it right now) that refers to the wall of light technique as the most devastating attack to use on a dark sider (or something similar to that.)
At this point I would also like to say that according to the wookieepedia page on force blasts it seems that the attack Kun used on Nadd's spirit is the same used on Aleema but it says that the Amulet's actually enhance the power of the blast (and thus arguably control the magnitude of the blast which would explain the discrepancy seen when he uses the attack on the sith wyrm,the massassi, and Nadd's spirit when compared to the blast he hit Aleema with) , so I am willing to be that Kun could also do it without the amulet.
It also seems that Kun can use another type of force lightning (called Ebony lightning in the JA series) which from the description of it seems to be different then the normal force lightning. I can provide descriptions of it, if anyone wants to see it and offer an opinion on it which I am interested in.
Force feats as spirit:
As a spirit he simultaneously force choke about 12 of Luke's students all at once. He can creates illusions as he did to Luke and Corran, and he also broke a couple of Corran's bones in a confrontation in the I,Jedi novel. He was able to kill Gantoris from the inside out presumably with sith lightning. He was also able to separate Luke's "spirit" from his body. If it were not for him aiding Kyp Durron, then he latter would never had been able to drag the sun crusher out of Yavin.
I also remember hearing something about his armor that he wore,which is able to turn off or short circuit(momentarily I believe) an opponent's lightsaber.