When it comes to Yu-Gi-Oh! antagonist Dartz really is just the embodiment of them all. Absolutely insane power that should be insurmountable but never is, a wild back story that has to be forced into canon in a way that really doesn't add up but okay, and a wild hairstyle to boot.
Dartz might not be the greatest villain, but he backs up everything he does with his incredible deck. It is filled with insanely powerful cards that only he has access to, making Yugi and Kaiba's duel against him one of the toughest that they've ever faced.
The Seal Of Orichalcos
The Seal of Orichalcos is Dartz's most trusted card, and it's also completely busted, but who's surprised because his entire deck is. The Seal of Orichalcos grants the player a ton of power, some of which are: the ability to move monsters into the spell and trap zone that then can't be attacked until the front row is destroyed, the ability to summon more than 5 monsters at once, a buff to each monster on their side of the field that grans them 500 attack points, and The Seal of Orichalcos can't be destroyed by card effects, also the loser of the duel loses their soul.
This cannot truly be a legal card and should absolutely be banned.
Orichalcos Deuteros
Orichalcos Deuteros isn't all that powerful when compared to the base seal, but it still powers it up nonetheless. After being played after the original seal is already in effect, Orichalcos Deuteros grants the player 500 life points for every monster they have on the field on their turn, and if their opponent declares an attack, they can tribute a monster and destroy the attacking monster.
While still a good card, it really doesn't do all that much to power up the already broken seal. Its second effect is much better than the first, however.
Orichalcos Tritos
Orichalcos Tritos is the final The Seal of Orichalcos, and this one is a biggin. It only has one effect, but it allows the player to negate and destroy and spell and trap cards that affect their own monsters.
This is a huge effect as it, along with the upgrades that monsters have from the seal, makes them incredibly difficult to destroy. However, Dartz has even more cards in his deck that help to keep his monsters protected, making this a wonderful shield to even further enhance his deck.
Mirror Knight Calling
Mirror Knight Calling is a ritual monster that summons four tokens that come with counters that allow them to not be destroyed once per turn. Also, whenever they engage in battle with an opponent's monster, their attack becomes equal to that monster. These things are absolute beasts. Combine them with Orichalcos Tritos and they're virtually indestructible.
Their only drawback is that they can't deal much direct damage to the opponent, but that is a very small price to pay for every other benefit they grant.
Impact Revive
Impact Revive is a dumb powerful version of Monster Reborn. It's only activatable in Main Phase 2, but it allows the player to summon a monster that was destroyed this turn to its respective side of the field, ignoring its summoning conditions.
It then gains 500 attack points, and the player can conduct a second battle phase. The second battle phase alone is broken, the summoning of a monster just makes it better.
Orichalcos Kyutora
This wonderful little eyeball is an absolute monster to deal with, as it stops you from taking any and all battle damage as long as it is face up on the field.
This is a good effect, sure, but that's not where it real power comes from. When Orichalcos Kyutora is destroyed, the player can summon one Orichalcos Shunoros to their side of the field. That's where things start getting scary.
Orichalcos Shunoros
Orichalcos Shunoros is an absolute mess in every way possible in the anime. This card gains attack points equal to the amount of damage that Kyutora blocked with its own effect. It also summons its own arms (?) into battle, but more on that later.
Any time that Shunoros battles a monster, it loses attack points equal to that monster's attack points. When this card is destroyed while having zero attack points, it is allowed to summon an unbeatable monster to the field that will be discussed a bit later.
Orichalcos Dexia
Orichalcos Dexia is one of the previous monster's arms for some reason, and it has a plethora of effects. To make things simple though, it cannot be destroyed while Shunoros is on the field, and any time that it engages in battle it gains the attack of the opposing monster +300, meaning that it will always win.
When it finished its battle, those attack points are deducted from Shunoros's attack points, contributing to its effect.
Orichalcos Aristeros
The other arm does basically the same thing that Dexia does, except flipped. When the opponent's monster attacks, their attack is redirected to Orichalcos Aristeros, who will gain its attack +300.
This also contributes to Shunoros's effect. As previously mentioned, when that card is destroyed with 0 attack points, it can summon a brand new monster to the field, Divine Serpent Geh.
Divine Serpent Geh
Divine Serpent Geh, when summoned, reduces its owner's life points to zero, but that doesn't matter, you can't lose the duel when it is on the field. In order to attack, its owner must send 10 cards from the top of the deck to the graveyard.
This card also Yugi is probably the only duellist who could beat this card.
