Yu-Gi-Oh! 2004 Labyrinth of Nightmare Booster Pack (NA Unlimited)

Labyrinth of Nightmare is a Booster Pack that is an amalgamation of the Japanese sets Labyrinth of Nightmare and Spell of Mask.

Labyrinth of Nightmare has been released in the Yu-Gi-Oh! Trading Card Game (TCG) in English, French, German and Italian and in the Yu-Gi-Oh! Official Card Game (OCG) in Asian-English and Korean. There are three separate prints for the TCG English: North American, European and Worldwide.

This set was also released in the Tactical Evolution: Special Edition, where it used European set numbers LON-E###, despite being released internationally.

In 2004, a worldwide English version of the set (LON-ENXXX) was printed in the Master Collection Volume 1. In all regions, this printing included the cards from the original North American release. This print made errata on many cards, including changing the term Magic Card to Spell Card.