How Come the Ace of Cups Doesn't Count As the Holy Grail?

[Welcome to the Yu-Gi-Oh! Roguelike World.]

[In this world, awakened from an ancient slumber, the Dragon of Creation has thrown all existence into chaos. As an alchemist, you must journey across the land to find a way to save the world.]

[Along the way, you will borrow the power of past Duel Kings to gather materials, forge them into cards through alchemy, and ultimately build your own deck. Your final mission? Defeat the Dragon of Creation in a climactic duel and restore balance!]

Yudou: "So, uh, question—why the hell did you send me to the Fate universe to fight in a Holy Grail War?!"

Sure, the system—based on the game’s mechanics—had granted him alchemy to forge Yu-Gi-Oh! cards from gathered materials.

But he was just an ordinary, physically unremarkable card game nerd! How was he supposed to compete with a bunch of cheaters who nuked battlefields with beams of light?!

Simple. He’d pivot into a Summoner and swarm the enemy with Duel Monsters while bombarding them with Spells and Traps!

"Oh, by the way—did you just summon five Skeletons?"

WOO—!

"METEOR’S COMING, BABY!"