Legendary Beast Kingdom

Many years ago, humans awakened powers called 'Animal's Soul' which gave them the ability to have immense strength and summon the beast that their souls represent. With these new powers was formed a new country called Zaun. And among them formed the Upper Class and Lower Class society. Spade, a boy born in the Lower Class society, was often ill treated and hated by the Upper Class due to his mischiefs in their area. He had a dream - to become the Apex Predator, who also rules the kingdom. And so he trained day and night and became stronger and stronger. However, he was instantly rejected by the kingdom due to him being unworthy as he was a Lower Class. Adamant on his goal and unknowing of the legendary beast that resides in his soul, Spade decides to challenge the whole kingdom and prove his worthiness. But is this the only problem in his way? There are things that even the Apex Predator fears himself. What is it? Read to find out!