PhoenixAsh

Aaron, a wildlife biologist, became a military strategist right after a global war between nations began.

He never wanted to participate in the war but he had to, because he wanted to continue his studies on endangered species the moment the war was over, but to his surprise, everyone in his unit were killed, including him, and the next thing he knew, Aaron woke up in the body of a young noble having a similar name to his.

However, he also noticed he had awoken in a world different from Earth. 

In this world, demonic beasts ran rampart with only one thought in mind, causing them to feed on anyone they see, be it humans, elves or even magical beasts as well.

During his first encounter with a magical beast, Aaron awakened a system which allowed him to bond with magical beasts and to obtain terrifying abilities from these bloodcurdling magical beasts, so he used his experience as a wildlife biologist to help make it easier for him to bond with these beasts.

However, Aaron also noticed he could evolve these beasts if their loyalty towards him had reached a certain level, so he vowed in his heart to grow strong enough to protect those he cared about in this world with the hope of living a happy, peaceful life where he'll be able to focus fully on his passion as a wildlife biologist.

My Beast Evolution System

The next morning, Aaron and his team entered a massive central chamber, their footsteps echoing loudly in the silence.

Also, the air was so thick with miasma that dark crystalline shards could be seen jutting out of the ground.

At the far end of the chamber, in a corner, everyone could see a massive demonic beast feasting on a large magical beast with dozens of smaller demonic beasts feasting on it as well, however, the large beast seemed a bit different from the other ones.

Detected Specie: Dark Vermins {65 in number}

Detected Specie: Dark Colossal Vermin.

Unlike the little demons, the colossal beast had a grotesque form with sharp claws, fangs, and wings as well.

47. Dark Vermin