The rise of Hollow hunters

The sky was painted in fire, the screams of the dying swallowed by the deafening roar of the Hollow Dragons. Beneath the scorched heavens, humanity clung to the depths of the earth, their last refuge in a world no longer theirs. Hollow Dragons ruling the world, humanity built a large underground continent divided into 3 levels upperland, middlelands, depthland half of each level divided into 2 half of the 3 levels under control of the country of heltyl and half of the 3 level to the country of milaya, both countries were bitter rivals while heltyl wanted to destroy the Hollow Dragons milaya feared Rayal Fenrir born into heltyl on 7th of September 826 AD, Rayal had just turned 9 years old when he found out what exactly are the hollow Dragons, he found out how horrifying they were, country of hetlyl wanted to demolish the species of the hollow dragon had no way to fly and reach them, Rayal had just turned 16 when he thought of going on ground with some few friend Layla, Elric, and dain all four of them in extremely alert on ground as they all looked at the hollow dragon wings tails 4 eyes coloured dark red breathing flame everyone was amazed yet scared when out of nowhere everyone fell from a gust of high wind it was a hollow dragon with someone in his mouth they looked around and DAIN WAS MISSING!, Everyone Started running towards the gates to go underground when suddenly they heard a chilling voice saying "Stop Youngsters"when everyone looked back and it was the dragon everyone was horrified but the next second the dragon said "i mean no harm" and enraged Rayal shouted "WHAT THE HELL DO YOU MEAN BY YOU DON'T MEAN NO HARM YOU JUST ATE OUR FRIEND YOU BLOODY DAMNED BEAST AND HOW THE HELL ARE YOU SPEAKING" The dragon again in his chilling voice replied "I get it your friend was swallowed by me but in exchange i got human like emotions intelligence and the ability to speak as an sorry i shall serve you as a ride" Rayal sat quiet there for a bit when another dragon was about to eat him the dragon that ate dain started fighting the other dragon and fiercely defeated it yet he had some major injuries which were regenerated in a minute, confused Rayal asked in a somber tone "wh–Why did you help us? " the dragon in his deep tone "as a sorry i shall serve for you humans" Elric and Layla were witnessing this Elric said to Rayal"Rayal this is a great opportunity, The dragons fly so we can't possibly reach them but with this dragon on our side we can ride him and use him to fight other dragons for the sake of humanity" Rayal understanding to get something you have to sacrifice something else he replied "yea we can create a army of us human who hunt down these dragons with the help of him but first we need to figure out how to kill these dragons since all dragon can probably regenerate like him" hearing him the dragon replied "The wings, The wings are the weak spot if us dragon if it is pierced through the dragon will go up in flame since all the flame that us dragon breath is stored their if that area is pierced it will leak and burn the dragon it self and the dragon wont have enough time for regeneration " Everybody amazed that he is actually on their side decides to name him "dragonista" and tells the news to the king of hetlyl Daigona.on hearing this the king Daigona decided to to make a association named hollow hunter that hunt wild dragons using the newly tamed dragon dragonista, the news reaches the rest or hetlyl and then milaya too, king of milaya has now discovered that their goal of having peace with the dragons is possible