I like the number zero

[Giga Hand]

The overall goal of these cards is to make up for the literally nonexistent stats with effect damage. It's not an archetype, but they're not exactly splashable either.

Insincerity
DARK/Fiend/Effect/Level 4/0 ATK/0 DEF
When this card battles: You can send 1 monster with 0 ATK from your hand to the Graveyard; This monster gains ATK equal to twice the ATK of the monster it's battling until the End Phase. Then, switch this monster into Defense Position at the end of the Damage Step.

[i]Okay, so not ALL of it is effect damage. Not much to say about this, it's a beatstick that can overpower anything but dies easily.[/i]

Terrible Nightmare
DARK/Fiend/Effect/Level 1/0 ATK/0 DEF
When this card is Normal Summoned: You can Special Summon 1 monster with 0 ATK from your Graveyard in Defense Position. Its effect is negated. You can tribute this card; destroy 1 monster you control and inflict damage to your opponent equal to its level x 200.

[i]Before you're all like "WTF this is OP with Yubel", that was the idea. 2000 damage isn't all that much in the grand scheme of things, and Yubel was kind of intended to be the key card of this set.[/i][i] Also, looking at certain other cards +0 damage while nuking your opponent's monsters is about average, also consider that Yubel decks aren't that great... yet.[/i]

Ancient Sorceror
WIND/Spellcaster/Effect/Level 4/0 ATK/0 DEF
Once per turn: You can send 3 monsters with 0 ATK and different names from your Deck to the Graveyard; destroy 1 card on the field and inflict 800 damage to your opponent.

[i]I can't think of any deck that would benefit from this card that isn't a Yubel deck.[/i]

Zero Summoner
LIGHT/Spellcaster/Effect/Level 2/0 ATK/0 DEF
Once per turn: You can Tribute 1 Monster with 0 ATK; Special Summon 1 Monster with 0 ATK from your Deck, except "Zero Summoner".

Burning Ember
FIRE/Pyro/Effect/Level 1/You-have-three-guesses ATK/The-first-two-don't-count DEF
When this card is Special Summoned: Inflict 500 damage to your opponent. When this card is destroyed and sent to the Graveyard: Inflict 500 damage to your opponent.

[i]May seem pretty useless, until you see this next card...[/i]

Army of Nothing
Normal Spell Card
While you control no monsters: Special Summon as many monsters with 0 ATK as possible from your Graveyard. Destroy them during the End Phase. You may not Summon other monsters during the turn you activate this card.

[i]Most "Special Summon as many x as possible" cards allow you to use them as fodder and stuff. As in, for Synchros. I want to use them for their effects.[/i] [i]I think this may be overpowered, but I often see people overreact to the power of certain cards, and I don't want to be one of them.[/i]