The Boy Who Ruled the Monsters

Sol Rock plays the role of support in Black Tiger, an up-and-coming party of prodigies known as the Miracle Children. His party sees him as deadweight and he's expelled by the leader, but the truth is that he has a special talent that gives him the godlike power to bestow incredibly OP skills and stats upon his companions! Only two members of his party, "Iron Wall" Reen and "Saint of Healing" Julia, realize that Sol is the source of their amazing powers, and they choose to leave with him. With no one holding him back, Sol can finally unleash his true potential, and he decides to use it to create the world's most powerful party. When Sol is offered five cards, each depicting a monster powerful enough to take on the world on its own, he begins a journey to gather them all to his side and fulfill his dream! (Source: J-Novel Club)