Can Playing Cards Really Destroy the World?

One night, a nameless girl and a battered knight crossed paths. That was the beginning of all their fates... "But what am I supposed to do with all these, Captain!? QAQ" Faced with the girl now surrounded by several Card Spirits, Captain White Crystal, who had watched over her like a doting father as she grew up, fell silent for a moment, then... gave her a thumbs-up. "Captain!!!" ====== Starting with Duelist Kingdom, with plenty of Kingdom-era rules lawyering (check). Mostly, I got tired of seeing so many fanfics use modern cards to crush cavemen, so I wanted to draw on my memories as one of the earliest card-game fans and write a story using cards that fit the setting of the time and aren't too overpowered. Hm? The anime and manga are full of ridiculous cards? That's a different matter (teehee~). Anyway, this is the story of a somewhat socially anxious girl and the invincible Captain White Crystal, collecting cards and dueling in a world where card games can destroy the world. (That's just a figure of speech; she doesn't collect all the cards.) I'll keep the decks' power levels under control. Almost all the cards will be ones available back then, and even when I occasionally use later cards, I'll try to keep them balanced, unless the opponent is using a cheat code too. Reader group: 523487243. Come join us!