Cards: I Have a Door to a Thousand Worlds

(No female lead)

“Making another lewd card? Can your body take it?”

Rika transmigrates into a world of cards, where everyone can wield cards in battle and craft their own.

They gather materials from secret realms and use them to make cards for combat.

In this world, Rika awakens a Gate to the Myriad Worlds, allowing him to travel across the heavens and realms to gather inspiration for card crafting. What he doesn't expect is that the worlds behind the gate are ones he knows: anime worlds, tokusatsu worlds, superhero worlds, and all kinds of movie worlds he's seen on screen.

He can even bring characters from other worlds to reality for a visit, and turn their powers into cards.

(It's fine if you haven't seen these works. Just think of them as secret realms. I'll introduce each world through the card-making process. Rika won't get involved in the plots for no reason; if he does, it'll be because there's material he's interested in.)

The real world and the secret realms are both fascinating, and so are the worlds beyond the Gate to the Myriad Worlds. Rika clenches both fists: “I want it all.”

One card after another, each uniquely his own, flashes through Rika's mind.

The real world:

Why is the water polo bubbling away?

Where do you get all these stories?

What do you mean you forgot to draw clothes on your character card? Ahem, how much is this one?

Movies and games:

What happens when Harry Potter's bloodline magic meets Frieren's scientific magic?

Could a Giant of Light get even bigger with the addition of the Heaven-and-Earth Manifestation?

(Feel free to share your ideas. If they're fun, useful, and make sense, I'll work them in.)

When Rika enters a dark secret realm and everyone else is preparing to retreat, they see him raise a card.

What does it mean for a Giant of Light to stand tall upon the earth?