Spike's P.O.V
I couldn't believe my eyes as I saw an unconscious Rainbow laying on her back. I looked at Spark, then she looked back. She was hooting questioningly. She was wondering if I was alright. Then, it hit me. "Um, Spark are you trying to protect me from her?" I asked her. She answered with a small grunt. Now, I realized something. But before I could say something, a red apple has struck the back of Spark's head which made her grunt in surprise. Both me and her looked behind us only to see Applejack juggling a single apple with her right hoof.
"You're gonna pay for what ya did to my friend, you monster!" Applejack shouted in anger. I looked to my left at my sister. She placed an angry grin that showed her fangs were cracking in said anger. Then, she perked her eyes up. Next, my sister closed her eyes and looked at the ground. I was wondering what was happening to her now. My answer came in a way that was unexpected. I felt her tail letting me loose. Then, I fell onto the ground on my rump. Next, I looked up to see my sister placing her paws on top of her head.
Then, something terrifyingly happened. My sister grew even more taller. Her muscles grew larger, her wings grew longer, and even her tail grew longer. And it only happened right after AJ threw that apple and called her "monster." Then it hit me that I now what caused her grow more: the madder she gets, the stronger she becomes, and the more she acts like The Incredible Spark, the more she acts like a beast. After she stopped growing, Hulklight was now 15ft taller than she originally was. Applejack lifted her left back hoof and stepped on the left handle of her wagon to tilt over and launch more apples out. Applejack turned to the right and started kicking apples while Pinkie used her front hooves to assault Hulklight with blue frosted cupcakes. Just like she did with that one storm creature. Hulklight used her left arm to block her face from the barrage of apples and cupcakes that were hurdling towards her.
I ran out in front of my sister and spread my arms out to try and shield her, even though that didn't work as well as I thought. After all, it looked better in my head. "Girls, you've got to stop throwing apples and cupcakes at her!" I yelled out with my paws close to my mouth.
The two earth ponies stopped throwing their projectiles at Spark.
"Why should we, though?" Pinkie Pie questioned me.
"It was the one who caused the damage and scared all the residents away into hiding!" Rarity shouted while abusing the green beast.
While they were talking about how much destruction the monster that was Twilight has caused, Spark planted her right paw onto the ground, and then she did the same thing with her left paw.
Spike's P.O.V
I stopped talking when I felt the ground shake twice and Spark puffed out her chest while inhaling a huge amount of air. Then, she lowered her head a little and opened her mouth and let a jet of green fire out and torch the area that was in front of her. Luckily, Rarity casted a dome of diamonds around her friends and herself as well as the unconscious Rainbow Dash.
I ran to her right arm and grabbed it. I started pulling on it because I know Rarity can't hold that dome up forever. "Spark! Stop!" I shouted while I was pulling her arm. But she didn't listen. So, I tried again, this time with another name. "Hulklight!" I yelled again, but she still didn't listen. Then, there was one last name. One that I will regret saying. "TWILIGHT STOP!" I shouted her name as loud as I could.
Spark heard her real name and closed her mouth, until she coughed three times. Then, she looked at me with fear.
Twilight's P.O.V. inside Spark's mind.
"I can't believe it. What have I done?!" I said in thought as I looked at the destruction I caused. My friends were in a diamond formed dome, surrounded by little patches of fire. Patches of fire I made! I don't know what has gotten into me, but I do know that I feel scared. Especially when I attacked my own friends. I turned to my right and grabbed my scared little brother with my left paw. Then, I looked up at the right where the mountain that once belonged to the sleeping dragon that was causing hazards by snoring smoke.