MTL - From the Head Pillar Tanjiro, Take Stock of the Wonderful Nicknames of Zongman - Chapter 566

Su Bai wakes up and finds that the world has changed drastically. He realizes he has come to a world of pets. After accepting the new setting, he is determined to become a powerful Pet Tamer.

Gawain is dead and was transmigrated, but there was a slight problem during the process.
After floating for more than a hundred thousand years on a different continent, he felt that he might need a body to become a complete transmigrator, but he did not expect that…

- Description from Novelupdates

15 years ago the world discovered magic as well as mythical beings (basically beings from various legends) in another dimension. Humankind learned to summon these dangerous mythical beings and use their power to great effect. Seven countries formed contracts with these “mythical beings” and gained their allegiance as a result. The mythical beings will choose their summoners on their 14th birthday and give them a stigma. Schools have been set up to train summoners and magical swordsman (basically bodyguards that give the summoners time to cast their spell) as a result.

15 years later after the finding of magic Kazuki Hayashizaki is chosen as a summoner and given a stigma to indicate that. This is surprising since males aren’t chosen as summoners due to their low amount of mana compared to females. As the first male to be a summoner Kazuki is under a lot of scrutiny by almost everyone.

To complicate matters his sister (who’s a magical swordsman) is against him going into summoner school to train there as a summoner. Because summoners and magical swordsman have a cat mouse thing going on where summoners look down on magical swordsman as inferior so his sister naturally is against him going there. She’ll stop him even if it means going to war.

Kazuki however is determined to thrive in summoner school and has already determined to give it his all. Even if he’s the lowest ranked student (ranked E) and his fellow students intend to demean him he’ll prove himself as the strongest summoner.

“They called me a beast,”“They called me a monster,”“They killed my mother and took my sister, yet they called me the animal!”“I will make them pay!”After losing his mother and a young age, Jayden struggled with rage and isolation, getting angry at everybody and everything, while still having the dreams of crushing those who took his mother from himBut his goal was hindered when he discovered that he couldn't possess an ability, he would remain a ordinary human in a world where power was everything.Years after being sent to therapy, he returns only to get struck by lightning. But before he could die, a mysterious interface appeared in his eyes[Requirement has been met][System integrating...][Alert! Non-human genes found in host; modifying system to meet Host's genetic code][Curse has been forcefully activated][Congratulations you have acquired the Beastlord system]“Huh? What the hell is this? And what curse is it talking about?” Jayden thought as he slowly lost consciousnessHe wakes up as a new being entirely, receiving various powers and abilities related to nature and it's creatures, but the most incredible was the absolute control over beasts. Now he could achieve his goals without being stopped and get revenge for his mother. While also leading a war with the ancient beasts against beasts from beyond.....“Mother, i have finally become the animal they say i am,” Jayden chuckled, as he stared at the bright full moon“I have become the lord of beasts,” he stated, as his body began to slowly transform into a large humanoid wolf.