Maou to Ore no Hangyakuki

A man discovers he has the most powerful ability in the world after being transported to a different realm, where he is labeled the "Suitable One" and given the "Holy Sword." Initially believing he will use this strength to achieve great feats, he finds that the dominant threat in this world are creatures known as "inhumans," which dominate and oppress the land. He begins to doubt his purpose and questions who he should wield his power against. The story is presented as an isekai battle fantasy.