System Wars: Here Comes the Heroes! - Chapter 31: A Do-Nothing Day to do some Heroic Training

He Yishu, the god of learning, transmigrated to the interstellar era where rune card masters and mecha warriors were respected. Everyone thought he was a loser because of his weak mental power and physique. Until one day, he inadvertently saw the famous work of a senior rune card master.

Wait!

That thing that seemed like a ghostly charm seemed to be …… Chinese characters?!

- Description from Novelupdates

Arthur Blackwynd didn’t expect to survive the strange and terrifying event that happened at sea. Even less did he expect to wake up in the DC Universe a world he’d only ever read about in comics.Armed with the Shadow Monarch System,the ability that grants him control over shadows and an undead army, Arthur is both awed by his new reality. As a lifelong comic geek, he knows the heroes and villains like the back of his hand Haunted by questions of why he’s here, Arthur struggles to find his purpose. Will he embrace the darker side of his newfound powers and become a villain, or will his sense of justice lead him down a different, unpredictable path?“why the likes of Raven seems to be watching my every move?” In a world full of gods, monsters, and legends, Arthur must decide who he will become and what role he’ll play in shaping the fate of the DC Universe.

A side story series featuring the girls of Kyoukai Senjou no Horizon.