Ultimate Monster Evolution

Ever since the dungeons opened up, Humanity realized that they had the ability to equip monster marbles that were inside of a monster. After equipping, they could now summon the monster. However, it wasn't until Mark used the highly mysterious Black Box that he realized that he could evolve the monsters. How will he use that to earn enough money and reach hunt dungeons to get the cure for his sister's amnesia? Will he be able to do this while keeping the fact about his ability to evolve monsters a secret? Read and find out.