As I've promised, I will now show all the OC Cards as well as the altered cards on this fanfic.

First are Cards that already Exists but was altered for the sake of Plot.

1) Shark Splash (Trap) - Shark Dash (Trap)

Original Effect: When a "Shark" monster you control is destroyed: Target that monster; Special Summon that target, but it loses 1000 ATK, then inflict damage to your opponent equal to its current ATK.

Added Effect: Can now be activated in your Main Phase/If used to bring back an XYZ Monster, attach this card as an XYZ Material.

2) No. 61 Volcasaurus 2500/1000

Rank: 5

Original Effect: 2 Level 5 monsters

Once per turn: You can detach 1 Xyz Material from this card, then target 1 face-up monster your opponent controls; destroy that opponent's monster, and if you do, inflict damage to your opponent equal to the destroyed monster's original ATK. This card cannot attack your opponent directly during the turn you activate this effect.

Alterations: This can now attack directly during the turn you activate it's effect as long as you use another XYZ Material. This card's stats are now lowered into 2300/800

Finally are OC Cards that I made, starting off with Ryoga's OC Cards.

Underwater Pressure (Trap)

Effect: When your opponent's Monster activates it's effect, negate that effect.

XYZ Lamprey 800/100 (Water) (Fish/Effect)

Level: 3

Effect: When this Monster is used as a material to special summon an XYZ Monster, increase that Monster's ATK by 1000

And now we have Ren's Cards.

Jurassic Stampede (Spell): Target 1 Dinosaur-Type monster you control. Until the end of this turn, it gains 1000 ATK, and if it attacks a Defense Position monster, inflict piercing battle damage to your opponent.

Dangerous Draw (Spell): Both players get to draw 2 cards from their deck to their hand. If they get a spell card, they will gain 500 LP, but if it's a monster card, lose 1000 LP.

Primordial Hibernate (Trap): When a monster of yours will be destroyed by battle, you can target that monster, gain LP equal to half of the targeted monster's original ATK and end the battle phase. That monster cannot attack or be used as a material for special summoning until the next turn.

Jurassic Taboo (Spell): Special Summon 2 "Dinosauria" monsters from your hand regardless of their level then pay LP equal to the level of the Monsters summoned x 100 and pay half of your LP to change the level of 1 Monster equal to the other Monster that was special summoned using this card. The special summoned Monsters cannot be used as materials for a special summon except for an XYZ Monster.

Final Gambit (Spell): If your LP is 1000 or below: Reduce your LP to 1, Draw 2 cards and negate damage received once.

Forced Adaptation (Trap): When an opponent's monster declares an attack: All Attack Position monsters your opponent controls lose 800 ATK for each monster they control.

Magic Regeneration (Trap): When an opponent's monster declares an attack, gain 1000 Life Points for each Spellcaster-Type monster sent to the Graveyard this turn.

Jurassic Mirror Force (Trap): When an opponent declares an attack to a "Dinosauria" Monster, destroy all cards on the opponent's field, special summon 1 "Dinosauria" Monster from your GY.

Dinosauria Utahraptor 1800/700 (Earth) (Dinosaur/Pendulum/Effect)

Level: 4

Pendulum Scale: 5

Pendulum Effect: All "Dinosauria" monsters you control gain 300 ATK.

Monster Effect: When this card declares an attack: All "Dinosauria" monsters you currently control gain 300 ATK, until the end of the Battle Phase.

Dinosauria Ankylosaur 1400/2200 (Earth) (Dinosaur/Effect)

Level: 5

Monster Effect: When this card is selected as an attack target by your opponent's monster, this card is changed to Defense Position.

Dinosauria Stegosaurus 1200/2000 (Earth) (Dinosaur/Effect)

Level: 4

Monster Effect: When this card in Defense position is selected as an attack target by your opponent's monster, this card is changed to Attack Position, if this card has a lower ATK than the attacking monster, reduce the attacking monster's ATK equal to this card's current ATK.

Dinosauria Triceratops 1500/1800 (Earth) (Dinosaur/Effect)

Level: 4

Monster Effect: Once per turn, add 1 Prehistoric Mark on all your "Herbivore" Monsters. Increase the ATK of all your "Dinosauria" Monsters by 500 for each of your Monster with 1 Prehistoric Mark.

Dinosauria Tyrannosaurus Rex 2800/2200 (Earth) (Dinosaur/Effect)

Level: 7

Monster Effect: When this card is Normal or Special Summoned: You can excavate the top 5 cards of your Deck; add 1 "Dinosauria" Monster and/or "Jurassic" Spell/Trap Card among them to your hand, also send the remaining cards to the GY. If this card is Tribute Summoned by Tributing 1 Level 5 or higher Dinosaur monster, you can excavate the top 10 cards of your Deck instead.

Once per turn, during your Main Phase, you can place 1 Prehistoric Mark on all Level 6 or below Monsters, you can also activate one of the following effects:

•If this card is on the field: You can target 1 face-up monster your opponent controls with a Prehistoric Mark; this card gains ATK equal to half of that monster's original ATK until the end of this turn. If this card attacks a monster this turn, inflict piercing battle damage to your opponent.

•If this card is in your hand: You can discard 1 Dinosaur monster from your hand; Special Summon this card from your hand, and increase it's ATK by 500 for each Monster an opponent controls with a Prehistoric Mark.

•Once per turn, during either player's turn, if a Dinosaur monster(s) with a Prehistoric Mark you control would be destroyed by a card effect, you can send 1 card from your hand to the GY instead.

•If this card is destroyed by battle or card effect and sent to the GY: You can Special Summon 1 "Dinosauria" monster from your Deck, except "Dinosauria Tyrannosaurus Rex".

Dinosauria Ankylostego 2500/2800 (Dark) (Dinosaur/XYZ/Effect)

Rank: 5

Monster Effect: 2 level 5 "Dinosauria" Monsters

Once per turn, during either player's turn, you can detach 1 XYZ Material from this card and target 1 face-up monster your opponent controls. If that monster attacks or is attacked this turn, negate its effects and, if you do, change its ATK and DEF to half until the end of the turn. After damage calculation, receive LP equal to the damage the opponent received.

More OC Cards coming in the future, do comment if I missed to put anything on this extra page.