Here's a little snippet of an idea: The Forceful Journey!

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On the verge of exhaustion himself, Harry had wondered how they were going to get out alive when the door at the top of the room suddenly burst open revealing the Order of the Phoenix who immediately set upon the Death Eaters thus giving the teens a small breather before they tried helping out their rescuers. As Harry stood facing Lucius and trading spells back and forth, Sirius stepped up and began helping Harry but was soon waylaid by Bellatrix Lestrange who was Sirius' older cousin. As Sirius began battling Bellatrix, Sirius began to get into the swing of things by taunting his insane cousin.

"Is that the best you can do?" Sirius asked flippantly. Bellatrix answered him by furiously attacking him and backing Sirius up towards Harry and the large archway to which Harry side at the side of still battling Lucius. At a lull in their battle, Harry looked around the room and saw that the Order had begun battling the Death Eaters has his friends rested. But unknown to Harry, he didn't see Sirius being backed up behind him and as he turned, Harry saw an iridescent colored spell hit Sirius and Sirius being flung backwards and to Harry's shock, into the archway.

"NO!" Harry roared as he faintly heard Bellatrix singing "I killed Sirius Black! I killed Sirius Black! I killed Sirius Black! I killed Siri-" Bellatrix was cut off as Harry seeing Sirius fall through the archway had whirled around and zeroed in on her gleeful mood and let out a raging roar and in a split second let his full body glamour fall and lifted his hands, and pouring his rage, his anger and grief at Bellatrix killing his godfather, Harry let loose blasts of purple-blue Force lightning from his fingertips which hit the psychotic witch and she fell to the ground screaming and writhing in pain for she had never felt pain quite like this.

Harry stopped the technique to let himself hear Bellatrix's groans of pain. "Now, Bellatrix you will experience the full power of the Dark Side." Harry growled out as he raised his hands again and let loose an even more powerful blast of Force Lightning. Harry looked up from Bellatrix's screaming and writhing body and the Death Eaters and Order member's alike stepped back in terror as they caught sight of Harry eyes. His eyes were no longer the emerald green color everyone was familiar with but a burning firey-amber color. Harry turned to his friends. "Do not hesitate. Show no mercy, My Council." Harry commanded as the teens bowed before Harry and twirling on their heels they released their glamours and flicked their wrists letting their sabers fall into their hands. The Death Eaters stepped backwards even more along with the Order as they took in this new development. a snap-his was heard followed by other similar sounds and suddenly the six cowled teens had blades of light in their hands in all different colors and Ron, Hermione, Ginny, Neville, and Luna began walking towards the crowd of adult witches and wizards, eager to fulfill their Grand Master's command. Harry moved towards Bellatrix who had now risen to her feet shakily, as she was still recovering from Harry's latest bout of Force Lightning when she turn and ran, Harry assumed back towards the atrium. Harry followed her retreating form at a slightly fast walk.

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Meanwhile, the Order of the Phoenix and Death Eaters had tried to subdue the five remaining teens, but to no avail as their spells were blocked or returned back to them by the teens various colored blades. The teens then waved their hands in short flicking gestures which caused the adults that were targeted to be flung aside thus clearing a path for the now attacking enemies who were now flinging dark spells at the five teens which were either blocked, redirected to the side or to the ceiling of the room.

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Harry's initial rage at seeing Sirius fall through the archway had dimmed, but in no way had it abated. He was now awash in new feelings. The feeling at being alive as he used his newfound senses which his new knowledge told him was Force Sense. The feelings of anger, sorrow and justice at what must be done. Harry unerringly followed the impression of Bellatrix that she made in the currents of the Force, straight to the gilded lift and through it straight to the atrium.

As Harry stepped of the lift and into the atrium, he received a sense of incoming danger from the Force and Harry immediately ducked as a bright red spell collided with the gilded lift behind him, leaving a decent sized hole a few inches above his head. Harry then dashed to the fountain in the center of the atrium as that was the only cover in the area as spells began to rain down upon his defensive position. Harry took a few seconds, then leapt out from behind his cover and began to block or deflect all of the insane witches spells back at her. Bellatrix shielded or ducked the ricocheted spells and returned fire.

"Scared Bellatrix?" Harry growled out, questioningly. "You should be." Harry said as he slowly advanced towards her. "Here's another taster of my Lightning!" Harry growled out as he directed the purple-blue currents of Force Lightning at her, causing her to scream harder than ever in agony. After a few more seconds, Harry let the technique go. "I bet you want it to stop don't you, Bellatrix?" Harry asked in false concern. The insane dark witch looked up from the floor at the dark countenance of Harry Potter.

"Yes." Bellatrix said pitifully.

"You can go crawl back to your half breed master and tell him you failed. Because out of the dozen Death Eaters he sent, only one was left alive." Harry replied.

"Is that so?" A cold voice asked. Harry turned to the voice and saw Voldemort, the Dark Lord of the Modern Age standing a few feet away.

"Yes, that's right Tom." Your lackeys are being taking care of." Harry said.

"By who? Not Dumbledore's pathetic band of revolutionaries." Voldemort asked curiously.

"No. By something darker. Something they haven't seen before. Harry replied conversationally.

"Your friends, perhaps?" Voldemort asked.

"Yep and the do such a good job of it too. Good help is just so hard to find these days isn't it. " Harry replied with a smirk as Voldemort snarled.

'You think your friends can stand up to MY Inner Circle?" Voldemort asked angrily.

"They can, have and did." Harry said as for the first time the Dark Lord took in the black colored-white core blade in Harry's hand.

"I see you gained a new trick, Harry." Voldemort said.

"Yup." Harry said in response.