Shadow Monarch In Danmachi

Damien Ardent, your average everyday worker, suddenly dies and finds himself in the outskirts of Orario the City of Gods and Familias, the City of True Adventurers! But wait, there’s more! Not only is he in a new world, but he’s also gained a completely new power, unlike anything familiar from his old world or new world! He has obtained none other than the powers of the Shadow Monarch! What will Damien do? Well, obviously forge a massive monster army, take all the girls he can, and have a fun adventure! — Description from novelcodex.org