Level One
The First One
The Other One
The Only One
"One" of a Kind
100

This Tuner has been forbidden on two separate occasions. 

What is Glow-up Bulb?

100

The first main deck Monster with more than 3000 ATK.

What is Gate Guardian?

100

No, not The Land Before Time! This Field Spell also summons a token to your opponent's field when you summon a monster.

What is Black Garden? 

100

It flips the deck upside-down.

What is Convulsion of Nature?

100

Draw a card and collect your thoughts; you're safe for the next turn.

What is One Day of Peace?

200

A skeletal ghost may not be strong, but this makes it trouble in large numbers. 

What is King of the Skull Servants?

200

The First Fusion/Effect Monster.

What is Thousand-Eyes Restrict?

200

No, it doesn't stop your opponent from attacking! But this Normal Spell also stays on the field until the end of your opponent's third turn.

What is Big Evolution Pill?

200

This card allows you to conduct two Battle Phases in one turn. 

What is Weather Report?

200

You couldn't activate this card even if you wanted to, but it can grab back your Mystic Mine after a Harpie's Feather Duster. 

What is Z-ONE?

300

While it's not likely searching an Egyptian God, this monster can search nearly any monster in the entire game.

What is Omni Dragon Brotaur?

300

The first Trap Card that summoned itself as an Effect Monster.

What is Cyber Shadow Gardna?

300

No, not the one with wannabe Arcana on it! This card's effect shuffles your deck and nothing else.

What is Tainted Wisdom?

300

It's the EARTH Sea Serpent.

What is Subterror Behemoth Stygokraken?

300

Cyber Dragon, Gradius, or even Mokey Mokey could win any battle with the backup from this card.

What is Honest?

400

The multitude of effects on this monster led to what would be an intuitive name, if not for a translation quirk.

What is Cyber Valley? 

400

The first Monster whose effect can only be used once per duel, although archaic templating led to it hitting the Forbidden and Limited List. 

What is Twin-Headed Behemoth?

400

No, not that old burning squid! This FIRE Aqua monster can be all the rave with your Gigaplant or Phoenix Gearfried. 

What is Chemicritter Carbo Crab?

400

It can summon 10 tokens simultaneously.

What is Phantasmal Lord Ultimitl Bishbaalkin?

400

It's no fake. This monster can set cards from your deck and later trade them away for graveyard value.

What is Altergeist Marionetter? 

500

This Dual-Archetype powerhouse prevents the opponent from both special summoning and flipping set cards - not just spells and traps, but monsters, too! 

What is Starduston?

500

The First Trap card that could be activated from the Hand.

What is Delta Crow - Anti Reverse?

500

No, not that infecting bug! This card shuffles something face-up into the opponent's deck and punishes them for drawing it. 

What is Grave Lure? 

500

This lets you look at your entire deck, regardless of size, and then do absolutely nothing else if you want.

What is Card of the Soul?

500

While the theme it belonged to was all the buzz, this monster never saw competitive play, despite summoning from the deck.

What is Wind-up Honeybee?

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