"Ding! Congratulations, Host. You've awakened the Anti-Demon King System, ID: 005."
"Your ultimate mission is to prevent the birth and rise of Shen Sui, the future Card Raider, Spirit Card Destroyer, and most evil and powerful Demon King in history. He will become a terrifying Demon King throughout the universe, with countless galaxies struggling to survive under his rule, and countless rare Spirit Cards plundered and destroyed by him. Next, we'll show you the rise of the universe's Demon King, Shen Sui. Choose the right moment to intervene and stop this demon, for the sake of the entire universe..."
"Once you successfully stop the Demon King's actions, you'll receive generous rewards..."
"Mm, I understand the reasoning, but I'm Shen Sui."
An original battle card story.