The original Yu-Gi-Oh! anime followed the adventures of Yugi and his friends as they traveled the world and engaged in numerous duels. Throughout the series, viewers were introduced to hundreds of different Duel Monsters cards, including some overpowered Yu-Gi-Oh! cards like the Dark Magician and the Blue Eyes White Dragon.
The most powerful Yu-Gi-Oh! cards would probably ruin any reasonable trading card game. Anime about trading cards, however, operates on a different set of rules. These cards possess arbitrarily high Attack Points, insane special abilities, and can unfairly cripple an opponent. These cards sometimes required complex strategies, but often were just unfairly overpowered in order to save the protagonists. These Yu-Gi-Oh! cards are too powerful, and often didn't make any sense within the rules of the actual game.
Simply put, there is a reason why the real world versions of these cards have been altered to drastically reduce their power.
Slifer The Sky Dragon Automatically Destroys Any Monster With Less Than 2000 Attack Points
At first glance, Slifer the Sky Dragon appears to be vastly weaker than its God Card brethren. Its power is solely dependent on the number of cards the user holds times 1000. This means that its Attack Points could easily drop to zero if a duelist is not careful. However, what makes Slifer the Sky Dragon truly terrifying is its special ability. When an opposing Monster is Summoned to the field, Slifer will automatically attack with its second mouth. This ability instantly lowers the power of the enemy Monster by 2000 Attack Points, then destroys any Monster whose Attack Points drop to zero.
This means that lower-level Monsters used to Summon stronger Monsters are going to be destroyed the second they are Summoned. Even if an opponent manages to Summon a high powered Monster, Slifer’s second mouth prevents it from being a threat by reducing its Attack Points. Slifer the Sky Dragon’s special ability is devastating enough that it more than makes up for its fluctuating Attack power, as it consistently destroys or significantly nerfs any Monster that faces it.
Exodia The Forbidden One Instantly Grants Victory To Whoever Holds All Five Pieces
Anyone who watched the original Yu-Gi-Oh! anime will remember this Monster well. Once a duelist holds all five piece of Exodia in their hand, they are automatically declared the winner of the duel. Having to pull all the necessary cards to Summon this all powerful Monster may sound difficult, but it becomes easier with a properly constructed deck. A duelist can load their deck with cards like Pot of Greed (which allows them to draw TWO CARDS) and Graceful Charity to increase the number of cards they can draw. This, in turn, raises their chances of getting all five pieces.
Exodia was the reason that Yugi was able to defeat Kaiba in the beginning of the anime. Despite facing all three of Kaiba’s Blue Eyes White Dragons, Yugi managed to Summon Exodia the Forbidden One, instantly granting him victory. When you consider how overpowered this card is, it’s not surprising that Yugi, shortly after his duel with Kaiba, lost three of the five pieces of Exodia when Weevil Underwood threw them off the side of a boat. It would have been very difficult for the audience to be worried about Yugi losing a duel if Exodia could be Summoned to save him, no matter how screwed he was.
Obelisk The Tormentor Can Make Its Attack Power Infinite With Two Monster Tributes
This terrifying God Card is without a doubt a force to be reckoned with. Just at his base, Obelisk the Tormentor possesses 4000 Attack and Defense Points. As if his extremely high Attack and Defense weren’t enough, Obelisk the Tormentor also has two devastating special abilities. The first allows Obelisk to destroy all Monsters on the opponent’s side of the field and inflict 4000 points of damage to an opponent’s Life Points, all for the low cost of sacrificing two Monsters.
What really makes Obelisk the Tormentor overpowered, however, is its other special ability. By sacrificing two Monsters, the user can make Obelisk the Tormentor’s Attack power infinite. This means that no matter how many Attack Points an opponent's Monster possesses, if Obelisk strikes it in Attack Mode or attacks an opponent’s Life Points directly, the duel is immediately over. With his raw destructive power and insane special abilities, Obelisk is truly worthy of the title Tormentor.
The Winged Dragon Of Ra Can Dramatically Increase Its Attack Points And Can Become Temporarily Invincible
It’s not surprising that the Egyptian God Card touted as the greatest would also be overpowered. The Winged Dragon of Ra’s Attack and Defense stats are dependent on the Attack and Defense points of the three Monsters used to Summon it. This means that its Attack can easily soar well above 3000, unless extremely weak Monsters are used as tribute. Even if weak Monsters are used to summon Ra, its special abilities would more than make up for a lack of Attack and Defense points. The Winged Dragon of Ra has a special ability that allows it to absorb the Attack and Defense points of tributed Monsters, and then attack each Monster an opponent has on their side of the field.
Ra’s second ability known as its "God Phoenix effect," and it prevents the user from taking any damage. By paying 1000 Life Points while Ra is in this form, it can destroy all Monsters an opponent controls.
Its last, and possibly most devastating, ability is its “one turn kill” effect. This ability allows Ra to absorb all but one of its owner’s Life Points to increase its Attack and Defense Points. This means that Ra could potentially add 3999 Attack and Defense Points to its already existing stats. The Winged Dragon of Ra was an overpowered beast that even Yugi barely managed to defeat, even when he was using the combined power of Slifer the Sky Dragon and Obelisk the Tormentor.