Doomsday: I Have Dual Systems

Dark clouds cover the sun, and the end of the world is coming. But there is always a path, and after killing monsters, humans will also gain new power. Fighters, clerics, monks, rangers, paladins, wizards, sorcerers, and more. Jiang Yun, who traveled through time, gained dual systems in one fell swoop. He could not only upgrade by killing monsters, but also exchange equipment and summon troops. Moreover, he can also enslave zombies, demons, etc. As hard labor, logging, mining, building houses, etc., All of which are not a problem. (Pseudo DND + Warcraft + Medieval Warhammer, etc.)