With Natsu
He was flabbergasted by the way his attack fought for a stalemate. 'That attack was one of my strongest. Damn you, Naruto. I'll finish this' thought Natsu and started to take large amounts of air.
Naruto saw this and smiled. 'Oh, he's going to use Dragon Roar. Well, I should use mine as well,' thought Naruto and started to take large amounts of air as well.
He made a barrier around the arena they are fighting in to minimise the damage to the surrounding area and not hurt any of his Guildmates. As their stomachs were filled with air and were ready to be released their respective Roar's. Natsu released it first.
"Fire Dragon's: Roar," yelled Natsu. Large amounts of fire was released by Natsu towards the Light All Slayer. The flames took the form of a Dragon and rushed towards the blonde.
"Light All Slayer's: Wrath," said Naruto. This is the equivalent of a Dragon's roar in All Slayer Magic. He can still remember the words said by his father.
Flashback Begin
It's been a year since Naruto started training in his Light All Slayer magic. He mastered all low-level attacks and had a good grasp on the mid-level once. He started to go through high-level attacks when his father interrupted him.
"Naruto, does that book have any attack equivalent to my Roar?" Asked the large Dragon God.
"What do you mean by that?"
"As you know, we Dragon's use our breath attack which is called the Dragon's Roar. Demons use a similar attack known as Demon's Rage. God's also has an equivalent one known as God's Bellow. Does that book have anything equivalent to these?" Explained Aldoron.
Naruto got a quizzical look and started to skim through the small book which gave him his magic. His eyes dilated at what he found.
"Father, I guess I found a similar attack. It is called…Wrath. Slayer Magic: Wrath" said Naruto.
"Good. If it doesn't have any, I thought of suggesting one. Now go, continue your training" said Aldoron and Naruto continued his training. As he was satisfied by the information.
Flashback End
"Light All Slayer's: Wrath," said Naruto. A blinding light engulfed the area and both Natsu's and Naruto's attacks collided with each other. But this time, the winner is clear.
Naruto's attack cut through the flames Natsu's Dragon Roar created and went straight for the Pinkett.
"Oh, oh," said Natsu, seeing the upcoming light. But before it can hit me, it dispersed, leaving him unscathed and confused
"Ah?" Asked a confused Dragonslayer.
"Naruto wins" came the voice of the proctor of the match, Makarov. That statement cut through the confusion in others like a hot knife through butter created by the sudden disappearance of Naruto's attack.
"Naruto won. Yay" shouted Cana in happiness.
"Damn, I thought Natsu would win," said a disappointed Jet.
"What do you expect from an S-class mage?" Asked Levi smugly.
"No matter. He proved his worth as an S-class I guess" concluded Macao.
"No kidding. Those attacks are entirely on a different scale" admired Wakaba, smoking his pipe.
"Naruto, meet me in my office at 7," said Makarov and walked off.
Everyone jumped in to celebrate Naruto's victory and some to tell a confused Natsu how he did great.
A lone figure seeing from the second-floor balcony smirked at this.
"Hn, as if that proves his worth as an S-class mage of Fairy Tail. Worthless scum" said Laxus, who returned from his job recently. He said it aloud and walked off as there was no one to hear that.
"That's a good match, Naruto" came the voice of a female knight as she walked towards him.
"Thanks, Erza. I just want him to know how there will always be someone stronger than us out there. That is a valuable lesson I learned in my training days" said Naruto with a smile.
"I don't know how much your intention worked," said Erza as Natsu was seen shouting towards him as he was just told about the full bet.
"No matter. He'll understand eventually" shrugged off Naruto. Erza nodded in understanding.