Replying...
Intro. A world of war where each country has adventurer guilds. Once upon a time, a western country discovered portals but these led to a world of chaos, dominated by demons, who devastated the world. In the end, a human race with demonic blood, the Dukzarists, tipped the balance and managed to close the portals. Time passed, and the Dukzarists disappeared across the world, some small portals open from time to time, and let some creature pass through.

The guild

@David