The Yu-Gi-Oh! anime is known to be pretty light when it comes to the rules of the game. It doesn't always add up, which usually makes for some pretty intense duels. One of the most common rules to be broken was using cards that were on the forbidden list.

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Examples like Pot of Greed come to mind right away. The forbidden list did exist at this point, but characters used plenty of cards that have been or are still on the forbidden list to this day. The show itself actually did have some form of a forbidden list, though. The first card on the list was on it.

Golden Castle Of Stromberg

Yu-Gi-Oh Golden Castle Of Stromberg card art

The Golden Castle Of Stromberg was never actually banned in real life. Instead, this card was banned in the canon of the show. It was a prize given away at a tournament that was never actually coded into the game.

As such, Zigfried was able to modify its effect and give Leon a huge advantage when he used the card in his duel against Yugi. The rest of the cards on this list were banned in the real-life version of the game, not the anime version.

Monster Reborn

Monster Reborn being played in Yu-Gi-Oh!

Just about every duelist in the game had Monster Reborn in their deck. The card, which allows players to special summon a monster from either graveyard to their side of the field, was one of the only ones that allowed players to special summon easily.

As such, it was an easy card to throw into every single deck. This was what got it banned in the real life version of this game, and what got it in everyone's deck in the anime.

Pot Of Greed

Pot of Greed in the Yu-Gi-Oh! anime.

Pot of Greed was just like Monster Reborn. It was an incredibly simple card that had a super great effect. Why not throw it into your deck? Pot of Greed allows the player to draw two cards from their deck.

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Besides being a great card, it allowed for some awesome battles where Yugi needed Pot of Greed to draw the correct cards to win or stay in the game at all. Of course, it always worked out when he needed it the most.

Harpie's Feather Duster

Mai Valentine in Yu-Gi-Oh! season one

Harpie's Feather Duster is an incredibly powerful card that just recently made it off of the forbidden list in the real-life game. It is still limited.

The card, which was used by Harpie enthusiast Mai Valentine in the anime, allows the player to wipe out their opponent's entire back row for no cost. This, of course, is fantastic. The only surprising thing here is that more people didn't use this card in the anime.

Chaos Emperor Dragon - Envoy Of The End

Chaos Emperor Dragon and Blue-Eyes White Draon in the Yu-Gi-Oh! anime on Kaiba's field

Chaos Emperor Dragon - Envoy Of The End was once a great card that eventually had its effect changed it was so powerful.

It's useless now, but originally it allowed its owner to pay 1000 life points to destroy every single card on the field and in both players' hands and fields, and the opponent loses 300 life points for each one. Talk about power. Kaiba used this one in his duel against Zigfried during the Grand Championship arc.

Raigeki

Joey Wheeler during a duel in Yu-Gi-Oh!

Raigeki was a card used by Joey during the Battle City arc. He only had this card in his deck when he was under the control of Marik, and it actually was banned in the canon of the show, as well. Cards like it and Hinotama weren't allowed to be used in Battle City.

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Raigeki is a card that allows the player to destroy every monster on their opponent's side of the field, so it makes sense that the card was banned for some time. The card is no longer banned in the TCG.

The Egyptian God Cards

Slifer the Sky Dragon, the Winged Dragon of Ra, and Obelisk the Tormentor in the Yu-Gi-Oh! anime

Despite not being good cards in the real-life version of the game, the Egyptian God cards were banned for some time. They were thrown around constantly during Battle City and beyond in the anime, though.

Originally under the control of Yugi, Marik, and Kaiba, they eventually all came under the control of Yugi, where they were used a lot less frequently in subsequent arcs. They did make appearances from time to time, though.

Ultimate Offering

Pegasus looking shocked in the anime

Prominently used in everyone's deck for some reason in the Pyramid of Light movie, Ultimate Offering is a card that can be used by both players on the field.

You can pay 500 life points to summon an additional monster during the main phase or the opponent's battle phase. It is way too good, which is why it was banned in the real-life game long ago. Fair game in the anime, though.

Change Of Heart

Yu-Gi-Oh! Yami Bakura during Battle City

A favorite of Bakura's in the anime, Change of Heart is a very simple card that allows the player to steal an opponent's monster for one turn.

It can be used for anything and has no cost associated with it, which is why the card was banned. This was used during Duelist Kingdom against the spirit of the Millennium Ring.

Cyber Jar

Yu-Gi-Oh! Yugi battles Noah

Yugi was in control of Cyber Jar in the anime after he combined his deck with Kaiba's in order to take on Noah.

The card is wildly overpowered, because once it is flipped, all monsters on the field are destroyed and each player must draw five cards and summon all monsters that they possibly can that don't require tributes. Talk about a reset.

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