Illegal

If a card is Illegal, it means is cannot be used in the official card game at all, not in tournaments, not anywhere. So far, these are the only illegal cards:

English

• King of Destruction - Xexex
• Obelisk the Tormentor
• Armament of the Lethal Lords
• Ulevo
• The Winged Dragon of Ra
• Meteo the Matchless
• Queen of Fate - Eternia
• Slifer the Sky Dragon
• Testament of the Arcane Lords
• The Seal of Orichalcos (It's illegal in english cuz it exsists.)

Japanese

• Black Luster Soldier (normal version)
• Fiend's Mirror (normal version)
• Masahiro the Dark Clown
• Super War-Lion (normal version)
• Tomohiro the Mountain Warrior
• Yasushi the Skull Knight
• Zera the Mant (normal version)