Black Summoner: Volume 3 by Doufu Mayoi

As Kelvin, the battle junkie Summoner hailing from another world, continues his extraordinary exploits, Goddess Melfina finally returns to his side, finally having completed her artificial body. When she grants him her blessing, he gains the power to summon a Hero of his own...who wants to become his sister?! As Kelvin and his party grow stronger by the day, he receives a summons for his Rank S promotion exam. The contents of the exam involve saving an elven settlement from the threat of a terrible monster, but just how much is the militaristic nation of Trycen involved? The black-clad warrior and his allies smash through everything in their way as they dive full throttle into the third volume of this epic journey!