ZeXal is prone to some idiot using "Dark Numbers"

[Toffee.]

And it will be some idiotic counterpart, just for rivalry moments, and be gimmicky as hell~

OCG name: Dark No. 39 Discouraging Emperor - Despair
TCG name: Number D39, Apocalypse
-DARK-
Rank 4
[Warrior/Xyz/Effect]
3 level 4 DARK monsters
If this is the only monster you control, this card is un-effected by the effects of Spell cards. When any player's monster declares an attack, you can detach 1 Xyz Material monster from this card and Target the attacking monster: Destroy it. If this card is selected as an attack target with no Xyz Materials: Banish this card. Then, both players take 1000 damage.
2500ATK / 2000DEF

Anyway, on with the actual cards...

Obscure Vulture - Talon -FIRE-
Lvl4
[Winged-Beast/Effect]
While this card is in your Hand or on the Field, you play with your Hand revealed. You can send 1 card on the Opponent's side of the field to the Graveyard: Special Summon this card(from your Hand). During a turn in which this card was Summoned in this way, you cannot conduct your Battle Phase, and you cannot Special Summon any monsters, except for "Obscure Vulture" monsters. Once per turn: You can send 1 other monster you control to the Graveyard and the Opponent Targets 1 monster in his/her Graveyard; Special Summon that monster to the Opponent's side of the field. Then, Draw 2 cards.
1800ATK / 0DEF

Obscure Vulture - Skull -FIRE-
Lvl4
[Winged-Beast/Effect]
While this card is in your Hand or on the Field, you play with your Hand revealed. You can send 1 card on the Opponent's side of the field to the Graveyard: Special Summon this card(from your Hand). During a turn in which this card was Summoned in this way, you cannot conduct your Battle Phase, and you cannot Special Summon any monsters, except for "Obscure Vulture" monsters. If this card was Summoned in this way, you can Target 1 "Obscure Vulture" monster in your Graveyard; Add the Target to your Hand.
1800ATK / 0DEF

Obscure Vulture - Sand -FIRE-
Lvl4
While this card is in your Hand or on the Field, you play with your Hand revealed. You can Discard 1 "Obscure Vulture" monster: Special Summon this card(from your Hand). While this card is face-up on the field: Draw 1 card each time an "Obscure Vulture" monster is Special Summoned from your Hand. You can only control 1 "Obscure Vulture - Beak".
1800ATK / 0DEF

Obscure Vulture - Heat -FIRE-
Lvl4
[Winged-Beast/Effect]
While this card is in your Hand or on the Field, you play with your Hand revealed. When this card is Summoned, Draw 1 card for each "Obscure Vulture" monster you control, except this card.
1800ATK / 0DEF

Obscure Vulture - Predator -FIRE-
Lvl4
[Winged-Beast/Effect]
While this card is in your Hand or on the Field, you play with your Hand revealed. You can send 1 card on the Opponent's side of the field to the Graveyard: Special Summon this card(from your Hand). During a turn in which this card was Summoned in this way, you cannot conduct your Battle Phase, and you cannot Special Summon any monsters, except for "Obscure Vulture" monsters. Once per turn, You can Pay 500 Life Points: Add to your hand 1 "Obscure Vulture" monster from your Deck. Then, the Opponent adds 1 monster from his/her Deck to his/her Hand.
1800ATK / 0DEF

Obscure Vulture - Raptor -FIRE-
Lvl4
[Winged-Beast/Effect]
While this card is in your Hand or on the Field, you play with your Hand revealed. If you control an "Obscure Vulture" monster, You can send 2 cards on the Opponent's side of the field to the Graveyard: Special Summon this card(from your Hand). During a turn in which this card was Summoned in this way, you cannot conduct your Battle Phase, and you cannot Special Summon any other monsters.
1800ATK / 0DEF

Desert Sands - Vulture Zone -Field Spell-
Each time an "Obscure Vulture" monster is Summoned, Inflict 300 damage to your Opponent. Then, the Opponent selects 1 monster from his/her Deck and sends it to the Graveyard. As long as this card remains face-up on the field, Decrease the ATK of all non-FIRE monsters by 500. If this card is destroyed by your Opponent's card effect: Banish all cards in both payer's Graveyards and both players Draw 2 cards.

Sandstream -Trap-
If an Opponent's monster destroys an "Obscure Vulture" monster you control as a result of battle, he/she Special Summons 1 monster from/her Deck to their side of the field. Then, add to your hand 2 "Obscure Vulture" monsters from your Deck.

Cactus Block -Continuous Trap-
Special Summon this card in Defense Position as an Effect Monster (Plant-Type/FIRE/Level 4/ATK 0/DEF 2500). (This card is also still a Trap Card.) This card cannot attack. During the End Phase of a turn in which this card was activated, change control of this card to your Opponent. You can Banish this card and 1 "Obscure Vulture" monster in your Graveyard: Draw 1 card.

[Bahamut - Envoy of the End]

It'll be negative Numbers obviously

Card itself seems... alright.

Obscure Vultures look ridculous to be fair, +1 a respectable beater just by special summoning, and keep resources stacked to do so.

[Toffee.]

[quote name='Majestic Star Bahamut' timestamp='1343968220' post='5996037']
Obscure Vultures look ridculous to be fair, +1 a respectable beater just by special summoning, and keep resources stacked to do so.[/quote]
Despite the fact the Vultures are the main focus of this topic....
I get the feeling I didn't really add enough restrictions/drawbacks to them.