I wouldn't really call these OP'd.

[T3RA PROWL3R]

Title.

[spoiler=Shadowsoul Overlord Dragon]

LOREThis card cannot be Normal Summoned or Set. This card cannot be Special Summoned except by tributing 1 face-up “Shadow Serpent Overlord Dragon” and 1 “Soul Serpent Overlord Dragon” on your side of the field. If either “Shadow Serpent Overlord Dragon” or “Soul Serpent Overlord Dragon” don’t exist in your Graveyard, destroy this card. When this card is summoned, you can remove from play all cards on your opponent’s side of the field and in their hand. This card is not effected by Trap Cards. Increase the ATK of this card by 300 for each “Shadow Serpent” or “Soul Serpent” card in your Graveyard. Once per turn, you can discard 1 card to destroy up to 2 cards on the field. When this card destroys a monster by battle, inflict 1000 damage to your opponent. When this card is destroyed except by its own effect, you can Special Summon 1 “Shadow Serpent Overlord Dragon” or 1 “Soul Serpent Overlord Dragon” from your Graveyard, ignoring Summoning Conditions.

 

 

[spoiler=Shadow Serpent Overlord Dragon]

LOREThis card cannot be Normal Summoned or Set. This card cannot be Special Summoned except by tributing 1 “Shadow Serpent Dragon and 1 “Overlord Dragon” on your side of the field. Once per turn, you can discard 1 card to destroy 1 card on the field. If this card destroys a monster by battle, you can Special Summon 1 monster from your opponent’s Graveyard to your side of the field in face-up Attack Position and it can attack directly until the End Phase. When this card is destroyed, you can Special Summon 1 “Shadow Serpent Dragon” from your Graveyard, ignoring Summoning Conditions.

 

 

[spoiler=Soul Serpent Overlord Dragon]

LOREThis card cannot be Normal Summoned or Set. This card cannot be Special Summoned except by tributing 1 “Soul Serpent Dragon” and 1 “Overlord Dragon” on your side of the field. Once per turn, you can discard 1 card to remove 1 card on the field from play. When this card inflicts battle damage to your opponent, you can select and remove from play 1 card in your opponent’s hand. When this card destroys a monster by battle, inflict 800 damage to your opponent. When this card is destroyed, you can Special Summon 1 “Soul Serpent Dragon” from your Graveyard, ignoring Summoning Conditions.

 

 

[spoiler=Shadow Serpent Dragon]

LOREThis card cannot be Normal Summoned or Set. This card cannot be Special Summoned except by tributing 1 “Shadow Serpent” and 1 “Dragon Dragon” on your side of the field. When this card is summoned, you can add 2 Spell or Trap Cards from your Deck to your hand. When this card destroys a monster by battle, draw 1 card. When this card is destroyed, you can Special Summon 1 “Shadow Serpent” from your Graveyard.

 

 

[spoiler=Soul Serpent Dragon]

LOREThis card cannot be Normal Summoned or Set. This card cannot be Special Summoned except by tributing 1 “Soul Serpent” and 1 “Dragon Dragon” on your side of the field. When this card is summoned, you can remove 1 card on the field from play. Once per turn, you can discard 1 card to return 1 card on the field to its owner’s hand. When this card is destroyed, you can Special Summon 1 “Soul Serpent” from your Graveyard.

 

 

[spoiler=Shadow Serpent]

LOREWhen this card is summoned, you can add 1 Spell Card from your Deck to your hand. When this card destroys a monster by battle, inflict 500 damage to your opponent. When this card is destroyed, destroy all cards you control.

 

 

[spoiler=Soul Serpent]

LOREWhen this card is summoned, you can return 1 card on the field to its owner’s hand. Once per turn, you can destroy 1 other card you control and draw 1 card. When this card is destroyed, remove from play all monsters you control.

 

 

[spoiler=Overlord Dragon]

LOREWhen this card is summoned, you can add 1 “Shadow Serpent Dragon” or 1 “Soul Serpent Dragon” monster from your Deck to your hand. Once per turn, you can increase the ATK of this card by 300 until the End Phase.

 

 

[spoiler=Dragon Dragon]

LOREWhen this card is summoned, you can add 1 “Shadow Serpent” or 1 “Soul Serpent” from your Deck to your hand. Increase the ATK of this card by 300 for each Dragon-Type monster in your Graveyard.

 

 

 

Yes, I know Shadow Serpent is already taken. I didn't want to break the flow of the card names.