Stone 

Stone looked to Rose "ill be back in a little while i got some business to attend to" with that he cast an earth spell a moved though the earth he traveled ahead of him and found a spot far enough away from the school so no one there would be in danger or even be able to hear the sounds of battle the then came out of the earth and grew sand wings he then jumped at the dragon and with his earth sword he cut the dragons lighting wings the earth neutralized the lighting and as the dragon fell to the ground Stone grabbed the small dragon 

"you say attacking dragons is what made you hate us fine but that was thousands of years ago humans don't like nearly that long and besides that he was not attacking us humans but a fellow dragon and he put human lives in danger doing it well guess what that makes him the aggressor and that means we have a right to defend are self's and you chose me as your rider so that means i have reason to take this dragon out and if i happen to have fun doing it well that's  just icing on the cake now sit back and let me handle this thing its what i have trained for my hole life"

with that he put down the dragon tuned to face his pray with a smile so far i have seen him use fire wing and lighting so i guess he has all the elements at his command that will make things entertaining with that he jumped at the falling dragon leaving the ground under his feet cracked with a small creator and in the blink of an eye he was face to face with his target he then swung his sword aiming for the dragons neck

Leo saw the dragon kidnap the dragon king and heard the headmaster orders but before he knew it the dragons rider disappeared before his eyes Leo took of his backpack and stood on it as he did glider wings and a tail came out of it he them made his bones hollow and crated a bone spear and by spinning it around he crated enough wind to fly off after the dragon