Hero's wrath (Kane/Harry Potter/Heroes of Olympus crossover)

Chapter 3

So, sorry for not updating for a while but, I finally did it! Don't expect too much from the chapter since it's pretty short and bad, as usual. Though hope u ppl like it!
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Annabeth's POV

   "Percy!" I called out, my voice sounded hoarse.
   We were both back in tartarus. I scanned the area. Percy was up against five giant cyclops and I was too weak to try to fight. "Stay down," he instructed.
   "You do not belong here," one of the cyclops said. "Here, we are stronger! We shall destroy you!"
   All five lunged and attacked him at the same time. Percy only deflected one of the cyclops, but he wasn't so lucky with the other four.
   His sword dropped and he coughed out blood. He looked me right in the eye, run, they told me but I couldn't. "Percy!" I said.
   "Now, it's your turn to die!" A cyclops said.
   Maybe, at least if I die, I could be with Percy, I thought. I looked at the cyclops right in the eye, then, I noticed something wasn't right. Wake up, I told myself but I just couldn't. "The only way out is to defeat us," the cyclops said. "And that's impossible, especially since your a girl, and girls are all weak!" The cyclops all laughed.
   I suddenly felt all better, I rose. I gripped my dagger tighter. "What did you just say?" I asked in a low voice.
   "Umm..." The cyclops said, realizing its mistake. "Nothing?"
   I charged and slashed everywhere. I jabbed a cyclops, did a flip over one and jabbed one in the stomach. I kept slashing until they were all gone. The ground was covered in golden dust from the monsters.
   My eyes opened and I was back at the Athena cabin. I sighed in relief. What time is it, I wondered. I looked at a clock and saw that it was only 5:48. I tried to fall back asleep but couldn't so I decided to take a walk around camp.
    The sun was just starting to rise "Hey wise girl," I heard a voice from behind me.
    I turned around to see Percy, well not real Percy, just Percy through an IM. "What's going on?" I asked him.
   "I'm leaving to go to Hogwarts," he said
   "Oh right, I remember Nico mentioning that,"
   "Yeah..."
   "Bye," I said.
   "Bye,"
   I sighed. I'm really going to miss him. I turned around and saw Leo standing behind me. "Aww, I just missed him!" He said.
   "What are you doing up this early?" I asked
   "Couldn't sleep," he said.
   "Me too, nightmares?"
   "Yeah, about potty face,"
   "Oh,"
   "What about you?"
   "Tartarus,"
   "Ouch,"
   "Yeah,"
   "Well, see ya,"
   "Yeah,"
   I watched the sunrise as I felt the cool breeze on my face. I got a book and decided to start reading. After about an hour, I decided to get breakfast. Everyone was up now. I sat at the Athena table taking my time then suddenly, I remembered I had school today. "Oh, styx," I cursed.
   I quickly got up and put all my books in my backpack and left.

Sadie's POV

   I rubbed my eyes and tried to pay attention in class but, failed. I felt exhausted. I stared at the clock, 8:48. The day's been so long already! I was in math class as Mrs. Moore lectured us about remembering the order of what we do. "You people have to remember, PEMDAS!" She said.
   "Could you make that more memorable?" A girl said.
   Please excuse my dear aunt Sally, Mrs. Moore wrote on the whiteboard. "P, parentheses, E, exponents, M, multiplication, D, division, A, addition, S, subtraction," Mrs. Moore told us, to be honest, I didn't really pay attention to any of this.
   After what felt like 100,000 hours later, the bell rang. I quickly found Annabeth. "Where's Percy?" I asked.
   "At some wizarding school called Hogwarts," she told me.
   "Oh, that explains it."
   "Yea,"
   Suddenly I heard a loud boom. The wall in front of us blew up. Students screamed and ran in fear. Standing in front of the explosion was Setne, again. He was smiling. "Hey Sadie! Oh hey Annie, I'm back!" He said in a peppy tone.
   Leo popped up behind us. "Oh, hey Leo! Have we formally met?" Setne asked

...........................

Anyone know what show the last part came from?