Summary
Yu-Gi-Oh! TCGhas had plenty of rare and pricey cards in the modern meta, but there are also plenty of retro cards that have increased in price over the years. However, if you’re a collector and want to know right now if you have something in your bulk that might just be worth something,
It has been 20 years since Soul of the Duelist was released in the TCG, and it has many iconic and retro cards in it. Some still see play in alternate formats while others have had new archetypes loosely based on these ancient cards. These are the most valuable cards from Yu-Gi-Oh! Soul of the Duelist.

10Armed Dragon LV5 (UTR) - Market Price: $25.37
An Interesting Level-Up Mechanic
The Armed Dragon archetype may seem familiar, but despite it being released during the Duel Monsters era of Yu-Gi-Oh! You might remember it fromthe GX era. This is due to the anime which has Chazz using the Armed Dragons in his deck.
Level Monsters are interesting since they can Special Summon stronger Monsters from the deck. In a way, it’s similar to how Pokemon deals with Evolution Cards but in Yu-Gi-Oh! You can send one Monster from your hand to the grave to destroy another Monster. If it destroys a Monster by battle, it can level up during the End Phase.

9Horus The Black Flame Dragon LV4 (UTR) - Market Price: $30.78
The Original Horus Monster
In addition to Level Monsters, Soul of the Duelist was also released during a time when Ultimate Rare cards were not limited toOTS Packsand special releases. This makes many of the cards from the set quite valuable.
One is Horus the Black Flame Dragon LV4, which can also level up after destroying another Monster in Battle. While it doesn’t have many powerful buffs, at least you can say it is immune to cards that try to steal it. Horus is loyal and an excellent classic card for your collection.

8Master Of Oz (UTR) - Market Price: $32.61
An Anime Favorite
Master of Oz is a Level Nine Fusion Monster. It has 4200 attack points, making it one of the beefiest cards of the time. It also requires the least amount of Monsters to make. However, besides being a powerful beat stick to run down your opponent’s Monsters it doesn’t have much else to it.
It can be summoned by fusing Big Koala and Des Kangaroo. This Monster is most known for being used by Chumley in one of hisduels from the Yu-Gi-Oh! GX anime. So if you’re into building decks based on anime characters, this is a must-have for your build.

7Inferno Fire Blast (UTR) - Market Price: $34.63
A Niche Burn Strategy
Inferno Fire Blast is named after the Red-Eyes Black Dragon’s signature attack. It is also part of the Red-Eyes cards and allows you to inflict damage to your opponent equal to one of your Red-Eyes Black Dragons on the field.
Most often this is a burn card for 2400 damage; however, it does have a few unique rulings. Monsters that are treated as a Red Eyes Black Dragon also apply and, while your Monster cannot attack the turn you use this, you may deal significant burn damage on turn one.

6Mystic Swordsman LV2 (UTR) - Market Price: $35.76
Warrior Monsters Have Levels Too
Mystic Swordsman LV2 is another Level Monster line, this time a Warrior. It can destroy any face-down defense position Monster by attacking them. It also doesn’t flip them face up which stops them from triggering their flip effects.
Like the other Level Monsters, Mystic Swordsman can level up to its next form by destroying a Monster. Unfortunately, this needs to be done through battle, which means Monsters destroyed by its effect do not count. This is why even today, players should read their cards before making plays.

5Horus The Black Flame Dragon LV 6 (UTR) - Market Price: $46.53
Climbing Up The Horus Ladder
Horus the Black Flame Dragon LV6 is the next step towards unlocking some excellent Monster effects. To help you get there, Horus is unaffected by Spells, which for the time it came out, is not bad as far as protection goes.
The main goal of this card is to beat over at least one Monster with it. Once you do that, you’re able to Special Summon the next Monster in the line by sending this one to the grave. Luckily, you don’t need the card in hand.

4Ninja Grandmaster Sasuke (UTR) - Market Price: $61.47
Defense Monster Get Defused
Ninja Grandmaster Sasuke saw more play in the past when beating over Monsters was a primary way of dealing with your opponent’s board. Sometimes, a Monster would have too high of a defense to beat over, giving your opponent time to set up their plays.
Ninja Grandmaster Sasuke can destroy your opponent’s face-up defense position Monsters when it attacks them. This was a good way of getting rid of those walls before the game became flooded with ways to destroy cards during the Main Phase.

3Mobius the Frost Monarch (UTR) - Market Price: $69.41
Classic Backrow Removal
Mobius the Frost Monarch was once a form of very good back-row removal. Simply by tributing over one card, you not only got a pretty strong Monster on your side of the field, but you could knock out not one, but two of your opponent’s Spells or Traps.
This is useful in a variety of different situations. For starters, it can get rid of Field Spells that are giving your opponent a buff. It could also be used as a way to get rid of your own floodgates or a combination of your or your opponent’s cards.

2Armed Dragon LV7 (UTR) - Market Price: $101.87
Destroy Your Opponent’s Monsters
Leveling up Monsters in Yu-Gi-Oh! has never been easy. It often requires Monsters to stay on the board long enough to get to their ultimate forms. This is usually difficult due to other cards that can easily remove Monsters using their effects rather than beating them over.
Ironically, Armed Dragon LV7 had a great effect for its time. By discarding one Monster, you can destroy all your opponent’s Monsters with attacks less than or equal to the Monster you discarded. So not bad, but also a lot of effort to get a Lightning Vortex.

1Horus the Black Flame Dragon LV8 (UTR) - Market Price: $449.99
The Original Horus Boss Monster
Horus the Black Flame Dragon LV8 is another Level Monster that requires plenty of setups to get on the field. However, unlike Armed Dragon, it has a pretty good effect that can stop any Spell card from going through.
While on the field, if you or your opponent try to activate a Spell card, you can negate the activation and effects. Nowhere on the card does it say this is a once-per-turn, meaning you can stop your opponent from using Spells until another card destroys this Monster.