To find out if a specific card is banned, you can:
* Consult the official Yu-Gi-Oh! Forbidden & Limited List: This list is updated regularly and specifies which cards are banned, limited, and semi-limited in different formats. You can find the official list on the Konami website or on various Yu-Gi-Oh! fan websites.
* Use a Yu-Gi-Oh! card database: Many websites and apps have card databases that will tell you the card's status (banned, limited, semi-limited, or unrestricted).
For example, if you're looking for information on the card "Pot of Greed", you can search for it on a Yu-Gi-Oh! database or on the official Forbidden & Limited List.
Let me know the card you're interested in, and I'll help you find out if it's banned!