The Demon Captors

The black flames

They went outside to see if Natsu is listening or not. But,when they reach there,the boy is already gone. Natsu was no where to be seen. Giving a sigh of relief,Zeref wanted to tell the Fairy Tail members about the demons that has been attacking them when suddenly a blast of explosion was heard two miles from where the guild. Natsu appears out of nowhere startled all of them." Natsu,what's going...""Stay back!" He yelled cutting  Zeref sentence. An army of demons suddenly appears." You can't fight all of them alone Natsu!" Erza said trying to convince him to let them help." The only one that can seal demons away,is me wasn't it?" He ask Erza back. The demons began to rush towards the guild. Natsu walks towards the demons at the same time. He took off his coat and threw it aside leaving him wearing a black t-shirt inside." I'm all fired up". He said. He ran towards the demons without hesitation. The others just watch as he took down the demons one after another. Finally,when there were ten demons left he suddenly stopped moving." Natsu...?" Erza looked at him with a puzzled look. Natsu closed his eyes for a moment and as the demons approaching he opened them only to see the demons were burned in a black flames. Everyone was shocked to see it. Except for Zeref,who looked furious." The black flames ." They heard him said." What was that?. He burned them all down in one shot!" Gray said,stunned with everything that happens in just a second in front him. Natsu stood there watching the the flames disappear and turned the fragment of the demons into crystals.
As he turned around,he saw the whole guild watching him in disbelief. He felt as if he saw the look before and walked his way to the back of the guild.