Apocoliptic Entities: Hogwarts Under Seige

I was sitting in my dorm, doing my charms essay, when a shrill scream came from the commen room. I opened the door and sprinted down the stairs, and stoped dead. The commen room was full of blood. A few of my dorm mates lay mangled and bloody on the floor. A few bodies hovered over my lifeless friends making hidious chewing noises. I could tell by the uniforms that these things were from the slytherin house. They had yet to notice me and didn't look up as I grabed a heavy candle stick off the mantal. With one quick swing I had the first monster unconsious. To my horror I relized that they had been eatting my room-mates bodies! I quickly gave blows to the remaining flesh eater's heads. I droped the candle stick and ran out into the hall. I colided with my friend Addi.
"Addi! What's going on? Slytherins were eating my friends!" I screamed, pale and shaking.
"Come on! Theres a pack of Gryffindors right behind me!" she grabed my hand and draged me into a sprint. I heard a dreadful moaning coming from the kitchens.
"Look!" I pointed ahead of us "The R.O.R!" I haden't relized were we had been running to. We quickly dissapered threw the doors. I held the doors closed just in case and heard a gasp from Addi. I turned around. The room was full of wepons of all kinds. I quickly straped a pink Katana case on my back and exsamind the blade. I sheethed my new sword and looked to Addi.
"What do we do now?" I asked.