Here's a breakdown of what might be confusing you:
* "Unlimited" in Yu-Gi-Oh refers to a card's rarity: There are three main rarities for Yu-Gi-Oh cards:
* Common (C): The most common rarity, printed in bulk.
* Rare (R): Less common than Common, often with a foil effect.
* Super Rare (SR): Even rarer than Rare, usually with a holographic effect.
* Ultra Rare (UR): The rarest type, featuring special printing effects and unique artwork.
* Secret Rare (SEC): Even rarer than Ultra Rare, often featuring special printing effects and unique artwork.
* Ultimate Rare (ULT): Extremely rare, often with special printing effects and unique artwork.
* Ghost Rare (GHOST): Extremely rare, often with special printing effects and unique artwork.
* "Unlimited" isn't a deck type: There is no official concept of "Unlimited" decks. You might be thinking of:
* "Unlimited Edition" cards: These are older cards printed in the "Unlimited Edition" set. They are still playable and legal in current tournaments, but they have different artwork and sometimes different effects compared to their later printings.
* "Unlimited" card pools: Some tournaments might use an "unlimited" format, where all cards printed are allowed. This is in contrast to formats like "Forbidden & Limited" which restrict certain cards.
In essence:
* There is no "Unlimited" deck type in Yu-Gi-Oh.
* The term "unlimited" refers to a card's rarity.
* "Unlimited Edition" cards are old printings of cards that are still playable.
* "Unlimited" formats allow all cards to be played.
Let me know if you have any more questions!