TCBOO
There Can Be Only One
One of the oldest cards in the game and part of one of the eternal decks, this LIGHT monster has seen play since the days of goat
Thunder Dragon
Dark Burning Attack
Dark Magician Girl
This card depicts Wattaildragon, despite predating that card by 6 years.
Ancient Rules
This is Tri-Brigade Kitt's older sister
Tri-Brigade Ferrijit, The Barren Blossom
This link monster was used with Topologic Bomber Dragon to remove any monster that managed to get in the extra monster zone. That was until the deck became a real Knightmare
Longirsu, the Orcust Orchestrator
JD
Judgment Dragon
While this card might be better known for searching Frightfur Patchwork, it's also able to add a copy of itself on attack declaration
Edge Imp Chain
Decode Destruction
Decode Talker
This fusion monster is immovable to all but normal monsters.
First of the Dragons
Before he was Evilswarm Exciton Knight, he was once this rank 4 monster, born from a lone Steelswarm coming into contact with a Vylon fragment.
Steelswarm Roach
Limited in 2007, this card was a powerful removal spell as it could remove monsters with high DEF.
Smashing Ground
G.B Hunter
Gladiator Beast Hunter
This card sees some success in Edison Format as a level 1 monster that can search itself to fuel Quickdraw Synchron and Drill Warrior
Volcanic Shell
Dragon Saber Blast
Dragon Master Knight
This card's effect is identical to Solemn Judgment, but you must control a high level normal monster to use it
Champion's Vigilance
This Gem-Knight form is fully optimized for combat.
Gem-Knight Zirconia
This is the only Spellbook card to have ever been limited
Spellbook of Fate
R-Genex
Real Genex
Once forbidden, this quick-play spell card often decided games during the dark days of PePe
Wavering eyes
Elemental Radiant Burst
Elemental HERO Electrum
This trap card was used in Gemini HEROs as a way to recycle Elemental HERO Neos Alius
HERO Blast
With his powerful Oni-Gami Combo, this monster defeated the mighty Vylon Disigma
Gem-Knight Pearl
Released as an ultra in circuit break, this card synergizes with certain link monsters to remove any monster on the board.
Magnarokket Dragon
B.E.S
Bacterium Empire Ship
This card has the ability to turn itself into Ally of Justice Catastor for any two attributes, provided you have two more copies of itself in your GY
Disciple of the Forbidden Spell
Crimson Fire
Red Dragon Archfiend
Released in Tactical Evolution, this card functions like Creature Swap, but only if you have a normal monster
Creature Seizure
After fleeing the Dogmatika, Albaz and Ecclesia stumble into this vast world
Great Sand Sea - Gold Golgonda
Part of a series of monsters dating back to Ancient Sanctuary, in lore, this card was the first of said series, as reflected in a secret rare from Legacy of the Valiant.
Erebus, the Underworld Monarch