ILLEGAL?

[Fang Ookami]

I found this on wiki,here it is:

Illegal
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If a card is Illegal, it means it cannot be used in the official card game at all, not in tournaments, not anywhere. The only exception to this is friendly duels where both duelists agree on the illegal cards in question in terms of their effects. So far, these are the only illegal cards:

English
Armament of the Lethal Lords
Chimaera, the Master of Beasts
Emperor of Lightning
Get Your Game On!
King of Destruction - Xexex
Meteo the Matchless
Obelisk the Tormentor
Slifer the Sky Dragon
Queen of Fate - Eternia
Testament of the Arcane Lords
The Seal of Orichalcos
The Winged Dragon of Ra
Ulevo
Asian-English
Firewing Pegasus
Kanan the Swordmistress
Obelisk the Tormentor
Slifer the Sky Dragon
The Winged Dragon of Ra
Japanese
Black Luster Soldier (DM)
Fiend's Mirror (DM)
Obelisk the Tormentor
Masahiro the Dark Clown
Slifer the Sky Dragon
Super War-Lion (DM)
The Winged Dragon of Ra
Tomohiro the Mountain Warrior
Yasushi the Skull Knight
Zera the Mant (DM)

It should also be noted that all fan-made and counterfeit cards are also illegal.

Retrieved from "http://yugioh.wikia.com/wiki/Illegal"

[Edo Phoenix]

Yup, those are all illegal. Pretty cool, huh?