That Breeder is the King of Fantastic Beasts

Tarik, a lowly breeder at the magic academy who was abandoned by his family as a child, unexpectedly rescues and forms a bond with a rare baby unicorn. At the brink of death on the borderlands, he not only sheds his disguise and awakens the supreme bloodline of the "King of Fantastic Beasts," but also summons the legendary sacred beast and finds his long-lost kin. Since then, his path to becoming the King of Fantastic Beasts begins.