"Well now that the your "great protectors" are dead, I can finally get on with killing you ponies."
Black Death made his way towards the trapped ponies. He was so focused on them that he didn't see the streaks of rainbow, magenta and orange going out of the canyon.
"YOU! BLACK DEATH!!"
The dragon looked up and saw the anger written on Rainbow and Scootaloo's faces.
"Oh dear, it looks like I've angered the chicken and her wimpy pegasus idol. Oh whatever shall I do?" Black Death wasn't in the least bit concerned about the two pegasi.
"YOU'RE GOING TO PAY FOR KILLING OUR SAVIORS!!" Rainbow Dash was seething with anger, Scootaloo had just as much anger boiling within herself as well.
"YOU TOOK THEM AWAY FROM ME AND RAINBOW DASH!! NOW YOU'LL PAY WITH YOUR LIFE!!"
"Don't flatter yourselves, neither of you could harm me before. Just try your best to bring me to my knees."
Both pegasi prepared themselves for what they were about to do. Rainbow looked over at Scootaloo one more time.
"Scootaloo, I'm not sure if your body can handle what we're about to attempt." Scootaloo looked at her idol with fierce determination in her eyes.
"Rainbow, this is the time where I get to show you what I'm made of. I'm going to make you, Tyrannosaurus and Indominus proud by the time this is over."
Rainbow gave Scootaloo a look of approval and they both dove towards the dragon. Their speed was building in the dives and everypony could see a barrier forming around each of them. Twilight's eyes went wide when she realized what was going to happen.
"Oh no, that's complete suicide."
"What is Twilight? What are they tryin to do?" Applejack asked.
"They're going to perform Sonic Rainbooms and use the speed from the booms to ram the dragon. There's no doubt it'll do serious harm to the dragon, but they'll end up killing themselves. At the speed they'll be going, their bodies will disintegrate upon impact with Black Death."
Applejack had a look of dread on her face, she didn't think that Rainbow and Scootaloo would resort to such desperate measures. Having the dinosaurs killed in front of them must've really riled up their rage. Black Death didn't know what the pegasi were trying to do, but as their speed increased he began to get an idea of what was going to happen.
"So, they're gonna ram me? Well, I'll be sure to cook them right before they deliver their last ditch effort."
The cones began to form around Rainbow and Scootaloo's bodies. They were on the verge of performing the Sonic Rainboom, but something was different. There were red electric strikes going around their bodies as their speed increased. Both pegasi seemed to be slightly glowing with the color of their manes and coats. Black Death saw his chance a blew a torrent of flame at the diving pegasi.
Rainbow and Scootaloo were speeding headlong at the fire that was heading their way. The fire was on the verge of colliding with them.
And then.
BOOOM!!
Two Sonic Rainbooms spread across the sky. One was Rainbow Dash's signature rainboom, Scootaloo's was a magenta and orange rainboom. Everypony looked at the incredible sight, and they could tell right away that they were not regular Sonic Rainbooms. Both had the same red electric strikes coursing throughout them that had been on Rainbow Dash and Scootaloo. Neither pony could be seen, but they hadn't been killed yet.
Everypony could see something cutting through Black Death's flame and heading straight for his face. The dragon stopped his fire, trying to see where the pegasi were in the blaze. What came out of the fire scared everypony and the Princesses on the spot. It was Rainbow Dash and Scootaloo alright, but something had happened to them.
Their bodies were covered in flowing energy that resembled Rainbow's mane and Scootaloo's colors. Their pupils had vanished, leaving only glowing white ovals in their place. Their mouths contained jagged fangs and the same white energy in the back of their throats They didn't look like ponies, they looked more like demonic creatures. Both of them bellowed a massive shriek as they sped towards Black Death. The dragon was so taken aback by their change that he didn't have time to move when both ponies rammed him in the head with the speed built up from the Sonic Rainbooms.
The impact was so strong that Black Death felt a long crack form inside his head along the surface of his skull. Blood spilled from his mouth as the dragon was sent flying backwards and tumbling over and over across the worn battlefield. He was stunned and dazed from the attack, he had never been hit by such incredible speed. As he got up, he heard the demonic shrieks again and saw both ponies speeding toward him. Their speed was still the same, as if ramming him hadn't slowed down their momentum.
Twilight and the others watched in shock as Rainbow and Scootaloo continued to attack Black Death with the same speed attacks repeatedly. Neither pegasus was slowing down or losing any momentum despite all the attacks they were dealing out. It left Twilight at a complete loss for words, this went beyond anything she thought pegasi were capable of.
"I don't understand, how is this possible? Their bodies were supposed to be torn to shreds with that first attack. How are they able to keep fighting like this?" Twilight felt a hoof on her shoulder, she turned and saw Luna looking at her.
"Twilight, there is only one way that this is possible. It was their love for the dinosaurs that made them like this. They loved those dinosaurs so much that those Rainbooms were made from sheer vengeance. It has made them into rage fueled animals that are going to keep attacking Black Death until he gives out."
"That's incredible, their love for the dinosaurs has made them as powerful as their saviors." Then something caught Twilight's attention. "Uh everypony, Sonic Rainbooms normally vanish after awhile right?"
"Yeah."
"Then why are their Rainbooms still in the air?"
"WHAT?"
Everypony looked and sure enough, both Rainbow and Scootaloo's Rainbooms were suspended in the air at their maximum size. It was like they were frozen in place, not budging except for the red energy that continued to pulse through them. Then both Rainbooms slowly began to sink down into the canyon. Nothing about this was making any sense, but Twilight couldn't think about the Rainbooms as she looked back across the battlefield.
Rainbow and Scootaloo had complete control over the fight. Black Death's power was useless against opponents that he couldn't even touch. He released his fire at Scootaloo, but she sped straight through the fire and blasted out the back of the dragon's mouth. Black Death doubled over from the agony in his mouth, that injury took a while for his power to heal. As the wound got patched up, he glared at the glowing pegasi.
"Where do you ponies keep on getting all these tricks? It's like no matter what I do, there's always something that you equines have ready to use against me. Very well, if I have to prove myself against you energy fueled animals then so be it, but this will be the last time!"
Rainbow and Scootaloo merely roared back at Black Death's challenge. Their white eyes bristling with fury, they erupted off the ground towards him. The dragon took flight to try and dodge them, but it was a big mistake. Both ponies went into spinning motions and combined their bodies until they became a spiraling spear. They pierced through the dragon's back and out his underbelly. Black Death fell out of the air with blood spilling out of the wound on his stomach. He crashed to the ground in a bloody heap.
Before he had a chance to get his bearings, his head was rammed by Scootaloo. He saw Rainbow speeding toward him and she rammed him from the opposite direction. Each blow was cracking the dragon's skull and making his head pound like an over-sized bongo drum. It wasn't possible how two ponies could attack with such ferocity and not feel any pain from the attacks. His body was trying to keep up the healing process, but it was proving difficult against such intense blows.
Twilight continued to watch in worry, praying that her friends would be able to hold out against their own relentless assault.