My best cards.

[yugiohdelta]

[img]http://img824.imageshack.us/img824/6559/231860w.jpg[/img]

1 Tuner, 1 Or More Non-Tuner monsters.
When This card Attacks Put A demon Counter On All Other Monsters On The Field.For Every demon Counter On A Monster It Loses 500 ATK.If A Monster's ATK Becomes 0 By This Effect Destroy That Monster.

[img]http://img11.imageshack.us/img11/9494/231860x.jpg[/img]

1 Tuner, 1 Or More Non-Tuner monsters.
If this card attacks and destroys a monster destroy all monsters on the field.


well thats them.

[cp14harpie]

Why is there all capital start letter?

Maybe this would be better (but not perfect)

[quote]
1 Tuner + 1 or more non-Tuner monsters

Whenever this card attacks, place 1 Demon Counter on each face-up monster other than this card. A monster loses 500 ATK for each Demon Counter on it. If the ATK of a monster reaches 0 by this effect, destroy it.
[/quote]

Edit: surpirsed when a new card appeared, seems you were editing the post while i was replying.

again my is not perfect OCG
[quote]
1 Tuner + 1 or more non-Tuner monsters

If this attacking card destroys a monster by battle, destroy all monsters on the Field.
[/quote]

[yugiohdelta]

[img]http://img37.imageshack.us/img37/7255/231860.jpg[/img]

1 tuner monster, 1 or more non-tuner monsters.
When this card is synchro summoned summon 2 "Pitch Black Tokens"(Dark,Beast type monsters 1500 ATK 1000 DEF.You can tribute 1 Monster on the field to special summon a Pitch Black Token.

[img]http://img63.imageshack.us/img63/7255/231860.jpg[/img]

1 Tuner, 1 Or More Non-Tuner monsters.
For every fairy in the graveyard this card gains 500 ATK.

[endphase]

Good cards. But "Catastrophic Demon Dragon" and "Angel Warrior-Shen" are overpowered. I mean, with "Catastrophic Demon Dragon" you can destroy almost all monsters on your opponents field, just by its effect. And, if you have 5 Fairy monsters in your graveyard, "Angel Warrior-Shen" ATK is 4600. 5/10 because the 2 overpowered cards. If they weren't overpowered 8,5/10.