Sentenced to the Kessel prison complex, young Kyp Durron grew up with no love for the Empire after his brother was conscripted into service as a Stormtrooper. His promising Force powers were lightly trained by another prisoner, Vima-Da-Boda, but it wasn't until a daring escape with Han Solo that Kyp was introduced to formal Jedi training. He began to study at Luke Skywalker's newly formed Jedi Academy on Yavin 4.
Kyp was a talented and strong student of the force but very arrogant. The spirit of ancient Sith Lord Exar Kun began to exploit this arrogance and turn him to the Dark Side. Kyp turned on Luke, disabling him and then fled the planet. He stole a new Imperial super weapon called the "Sun Crusher." The Sun Crusher was a start ship that fired missiles that could cause a star to go Supernova. He used the stolen weapon to destroy the tar system of the planet Carida. He chose Carida because it was the location of the Imperial Military Academy his brother was taken to.
Eventually Master Skywalker and Han Solo were able to bring him back to the Light Side of the Force and Kyp willingly volunteered himself to stand trial for what he did. The New Republic left the final decision to Luke and he allowed Kyp to resume his Jedi training.
Kyp would become a full Jedi Knight and eventually a Jedi Master and member of the Jedi Council by the time of the Yuuzhan Vong invasion. He was an outspoken member of the council and still maintained a lot of the arrogance he displayed as a youth but was a respected member of the Jedi Order.
Kyp Durron was very strong in the Force. So strong, that Luke has described him as being "frighteningly" powerful,, and when his Force potential was tested by Skywalker, he discovered it was the most daunting presence he had felt since his masters - Yoda, and Obi-Wan Kenobi.
With minimal training at Luke Skywalker's Jedi Academy, Kyp vastly surpassed ever apprentice by "lightyears", and pulled off amazing feats of finesse in the Force through telekinetic displays. Even before any formal training, and only rudimentary tutelage from Vima-Da-Boda, Kyp used the Force proficiently enough to display minimal precognition, and latter on, used the aforesaid ability to a significant degree, when he, while piloting the Millenium Falcon, plotted a hyperspace rout through the Maw in resided in Kessel Sector.
Later, under the influence of the ancient Sith Lord Exar Kun, and through the utilization of both telekinesis and Electronic Manipulation, was able to activate the Sun Crusher, a dreaded Super-weapon of mass destruction. Gradually, Durron's power increased, as evident in him adroitly employing Alter Environment to kill a life eating, Sith Leviathan.
Sometimes during the Yuuzhan Vong War, Kyp was able to come up with the "Shadow Bomb" maneuver, a technique, that revolves around hurling Proton Torpedoes at Yuuzhan Vong ships via telekinetic influence, so they wouldn't be traceable by the Vong's sensor devices. Kyp was also skilled in mintricks and other intricate abilities, to the point he could implant memories in others, and give mental energy to a lethargic man.
His greatest feats of Force power however, both came at the expense of the Yuuzhan Vong: the first was using a dead space freighter as a telekinetic weapon, sending it hurling with great speed at a Vong space vessel, and the second - manipulating and moving a Dovin Basal generated singularity.
Being a Jedi Master on the High Council, Kyp was an very adept duelist, and was known as a swordsmaster.
He has dueled, and slew many Yuuzhan Vong Warriors during the Yuuzhan Vong War, and was latter placed on a equal tier to the likes Kyle Katarn, and above the more serene Cighal - according to the Grandmaster of the New Jedi Order, Luke Skywalker.