So I've been writing a Yugioh fanfic and some of the cards I made aren't too overpowered (like the Color sprites) so I figured I'd post some of them smile

Deepsea Dragon - lvl 4 water/dragon 500 attack 1200 defense
When this card is summoned the owner of the card takes 500 points of damage. During the first end phase that this monster is on the field, inflict 800 points of damage times the number of Deepsea Dragons on your side of the field to your opponent.

Final Decision - Normal Spell
You and your opponent each sacrifice a monster. Your opponent takes damage equal to the current attack of the monster you sacraficed and you take damage equal to the current attack of the monster they sacrificed.

D.D. Amateur - lvl 3 dark/warrior 1200 attack 1000 defense
By removing this card from your hand from play, you may remove from play a monster in any player's graveyard from play.

Child of Dark Magic - lvl 4 dark/spellcaster/tuner 1200 attack 1500 defense
By paying 1000 life points activate a normal spell card from your deck or grave. If you activate it from your deck, send it to the grave. If you activate it from the grave, remove it from play. You can only use this effect once per turn.

Kuri Kuri - lvl 1 300 attack 200 defense
You can send this card from your hand to the grave to negate any effect damage. The turn that this monster is removed from play you can redirect damage that you would have taken to another player.

Protector of the Young - light/winged beast/synchro - lvl 5 - 1900 attack 2500 defense
1 tuner + 1 or more non-tuners
While this monster is on your side of the field, your opponent may not target another monster with a level lower then this monster's. When this mosnter battles, you take no battle damage. This monster can decrease its attack by 500 to keep from being removed from the field.

Aquarian Phoenix - water/winged beast - 3000 attack, 2500 defense
Increase your life points equal to half of your opponent's life points. Increase this monster's attack by the amount of life points you gained until the end phase of the turn this monster was summoned.

Final Beserk Moment - quick play spell
All of your monsters get a second attack, in exchange you take the same amount of battle damage that your opponent takes due to this card's effect.

Hellfire Viper - Fire/Reptile lvl 3 1000 attack 700 defense
This monster can attack directly. Every time this monster inflicts battle damage increase this monster's attack by 100. During your end phase inflict 500 points of damage to your opponent.