E Plurbus Unum
Kirin, Yaksha, Ringbali
Fire King
The "Well" in Well-e-Dad comes from this card.
Telekinetic Power Well
One of the most powerful spells of all time, this card, a staple in Rescue Cat decks, is inexplicably at 3 copies, though it would be banned eventually.
Last Will
Ancient Gear
Tri-brigade Kitt
One of, if not the only rank 2 in the format, this card catapaulted Agents to their first win at Worlds.
Gachi Gachi Gantetsu
Crystron
A powerful card in the format preceding Edison (also combined with Deep Sea Diva), this monster would later be rediscovered during a Halloween event hosted by E3 Yugioh, when its won the entire event.
Goblin Zombie
Ooh Ooh Ahh Ahh
Berserk Gorilla
Dawn of Majesty
Burst of Destiny
Battle of Chaos
Photon Hypernova
Cyberstorm Access
Swordsoul
Early OCG Ryzeal builds played Traptrix Rafflesia, because this card fit the requirements for its effect.
Ryzeal Plasma Hole
Thunder King Rai-Oh
Astra, Defanging, Alternative
Scareclaw
A commonly seen monster in Fairy strategies, this is one of the few monsters in the format that you actually don't want to declare priority with, since any kind of removal would cause itself to miss timing.
Dimensional Alchemist
Sinister Serpent is the poster child in Goat Format for infinite discard fodder, though you can only do it once per turn. This monster, when combined with another copy of itself, actually is infinite discard fodder, which is why it would later be limited and eventually errata'd.
Night Assailant
Rokket
Despian Luluwalilith can summon a LIGHT Spellcaster with equal ATK/DEF. You're supposed to grab a monster like Quem or Cartesia, but you could also summon this mecha-anime-inspired tuner.
Centiruion Primea
Piper Chaos exists as a deck because this monster lets you reuse it every turn.
Kinka-Byo
Testament, Vanguard, Draco
Crusadia
Despite having an effect that negates activations, this quick-play spell's print by the time of Edison Format forgot to include the phrase "except during the damage step."
My Body as a Shield
In Flip Control, Tsukuyomi combines with this monster and Time Seal to, in theory, prevent your opponent from ever drawing a card.
Mask of Darkness
(The) Agent
Return of the Monarchs famously can search Dark Armed Dragon. It can also search this monster, a rarely-seen member of one of the most hated archetypes of 2024.
Kashtira Ogre
Due to the overall strength of Beasts and Beast-Warriors, such as Reborn Tengu, T.G. Rush Rhino, and even Scrap Beast, this trap card from Duelist Revolution is an easy way to gain advantage off winning battles.
Horn of the Phantom Beast
Attack, Return, Release
Orcust
Black Brutdrago
In MBT's Twitter Thread on Goat Format, he notes that many modern cards that would instantly destroy the format, such as Chaos Angel, are outable because of this humble warrior monster and her non-destroying removal effect.
D.D. Warrior Lady
True King/True Draco
Did you know that, due to the existence of this card, Elemental HERO Shadow Mist has synergy with Geargia?
Geargia Change
Recently gaining popularity in Edison Format, this card is a mainstay of Tengu, due to the popularity of a certain Fairy strategy making it easy to Special Summon.