Disclaimer – I'm not even close to owning the wonderful world of J.K. or and characters in this story.
Finish the fight
As the defenders of Hogwarts watched in fascination at these two enemy's turned friends, there were several loud cracks as more members of the gathering walked up to Harry and Snape, "gather friends, the time is upon us to fight!" The Group of students and professors along with the gathering raised there swords in salute to Harry and Severus. The gathering formed a line in front of the Hogwarts defenders. The only difference between the gathering and the students and teachers was the armor, while the Hogwarts group was pure white; the gathering however had obsidian symbols around the neck and down the arms of the metal.
As the gathering and the students and professors began to prepare to fight, there was an unearthly howl, rumbles across the ground and in to the ears of everyone prepared to fight and die for what they believed in then across the field, 12 mountain giants came clambering out of the forbidden forest. Followed by thousands upon thousands of werewolves, vampires, and dementor's. Harry began to walk back toward the castle muttering under his breath, when the rest of the professor's saw this McGonagall Yelled "what are you doing Mr. Potter?" he didn't turn around or respond but kept walking to a blank wall that suddenly turned into a magnificent door way which he opened and disappear through.
All the Professors looked at the place where Harry had just gone, but there attention was swiftly brought back to the battle cries of the 12 giants pounding away at the ward of the school. The professor's watched in shock as the clubs of the trolls simply bounced off the ward and rebounded into their faces. The 12 trolls dropped to the ground, unconscious. All the others began to charge the gathering, who were prepared and cut them down once they were in reach, but as the battle began to get hard the gathering and the defenders began to lose ground, there was a deafening roar, and everyone looked to the sky to see where it came from, and to the dread of the gathering and the defenders, 35 Hungarian Horntails came flying over the forest.
As the gathering was just about to give up from the sheer amount of recourses the enemy possessed a large black shadow flowed over the field. Everyone including the dragon looked at the mountain that over looked the Castle to See a Mammoth red, silver, and gold Dragon. Atop this magnificent creature sat Harry Potter. The dragon raised its wings, and with effortlessly rose into the air, to face the Horntails.
As the Death eaters riding the horntails watched this creature approach, they sneered at who was riding it and began to attack the massive creature at will. The dragon kept flying as though flies were biting it, and it shrugged it off. With one massive breath from this monster half of the werewolves were on fire, while the rest were shaken they did not stop pressing the attack. However under the assault of the massive Dragon the enemy line started to crumble.
Snape saw this and called to everyone around him "Press the Attack; we have them on the Run!"
And as a group the Gathering, the Hogwarts protectors and Harry, all pushed the dark creature back out the gates of the castle…...