The Strongest Yu-Gi-Oh! Duelist

Bai Luling is 20 years old and studies at a well-known university in Beijing. He's been a Yu-Gi-Oh! player for 20 years and used to lead an ordinary life, until 2022, when most of the world's population was transported into a world where everything revolved around Yu-Gi-Oh!. (I've only included the summoning methods from Yu-Gi-Oh! series 1 through 6. Don't ask why I left out 7. The seventh series was so bad that I didn't even make it to Maximum Summon.)