Darth Bane Vs Darth Plagueis

After absorbing blaster bolts, Plagueis projects Lightning powerful enough to lift Wandau to the ceiling and seemingly reduces his bones to dust.

The lightsaber had scarcely left the Muun’s grip when Wandau flew from cover to bring the attack to the Muun, triggering his blaster as ceaselessly as Maa Kaap was still doing. This time, though, the Muun merely stretched out his right hand and absorbed the bolts. Traveling up the length of his arm and across his narrow chest, the energy seemed to fountain from the hand awaiting the return of the spinning weapon as a tangle of blue electricity that hissed from his tapered fingers, catching Wandau full-on and lifting him to the ceiling of the hold before dropping him to the puddled deck in a heap, as if his bones had turned to dust.

--Taken from Darth Plagueis

He generates Lightning that spreads across a landscape.

Getting to his feet, Plagueis extended his long arms in front of him and loosed a storm of Force lightning that crackled over the landscape, igniting fires in the grass.
“A Jedi sufficiently strong in the Force can be trained to produce a facsimile, but not true Sith lightning, which, unabated, has the power not only to incapacitate or kill, but to physically transform the victim. Force lightning requires strength of a sort only a Sith can command because we accept consequence and reject compassion. To do so requires a thirst for power that is not easily satisfied. The Force tries to resist the callings of ravenous spirits; therefore it must be broken and made a beast of burden. It must be made to answer to one’s will.
“But the Force cannot be treated deferentially,” he added as a few final tendrils sparked from his fingertips. “In order to summon and use lightning properly, you will someday have to be on the receiving end of its power, as a means of taking the energy inside yourself.”
Sidious watched the last of the brush fires burn out, then said, “Will I eventually be physically transformed?”
“Into some aged, pale-skinned, raspy-voiced, yellow-eyed monster, you mean. Such as the one you see before you.” Plagueis gestured to himself, then lowered himself to the ground. “Surely you are acquainted with the lore: King Ommin of Onderon, Darths Sion and Nihilus. But whether it will happen to you, I can’t say. Know this, though, Sidious, that the power of the dark side does not debilitate the practitioner as much as it debilitates those who lack it.” He grinned with evil purpose. “The power of the dark side is an illness no true Sith would wish to be cured of.”

--Taken from Darth Plagueis

Plagueis strikes with enough force to break opponents' necks and send his fists through armored assassins' torsos.

Others Plagueis felled with his hands by snapping necks and putting his fists through armored torsos.

--Taken from Darth Plagueis

Plagueis and Venamis fight fast enough to seemingly leave trails of light from their blades scattered throughout various parts of a forest.

To Plagueis, lightsaber duels were tedious affairs, full of wasted emotion and needless acrobatics. Tenebrous, however, who had pronounced Plagueis a master of the art, had always enjoyed a good fight, and had clearly bequeathed that enthusiasm to his other trainee. For no sooner had the blades of their weapons clashed than Venamis began to bring the fight to him in unexpected ways, twirling his surprisingly limber body, tossing the lightsaber from hand to hand, mixing forms. At one point he leapt onto an overhanging greel branch and, when Plagueis severed it with a Force blow, hung suspended in the air—no mean feat in itself—and continued the fight, as if from high ground. Worse for Plagueis, Tenebrous had made Venamis an expert in Plagueis’s style, and so the Bith could not only anticipate but counter Plagueis’s every move. In short order, Venamis penetrated his defenses, searing the side of Plagueis’s neck.
The contest took them backward and forward through the trees, across narrow streams, and up onto piles of rocks that were the ruins of an ancient sentry post. Plagueis took a moment to wonder if anyone at the fort was observing the results of the contest, which, from afar, must have looked like lightning flashing through the forest’s understory.

--Taken from Darth Plagueis