Really can't into coding and can't make it myself. so i'll just make the effects easier

Main Deck:

Mesozoic Raider - Velo
Dinosaur / Effect
WIND / LVL4 1400/1000

When this card is Normal or Special Summoned, you can Special Summon 1 level 4 "Mesozoic" monster from your hand. You can only use the effect once per turn.

Mesozoic Raider - Rhampas
Dinosaur / Effect
WIND /LVL4 1200/1200

If 2 or more monsters are in the field, you can Special Summon this card (from your hand). Once per turn, you can target 1 monster on the field, the level of all monsters you control becomes that of the targeted monster

Mesozoic Swimmer - Coelecanth
Fish / Effect
WATER / LVL3 1000/700
You can discard this card to target 1 monster you control, it gains 800 ATK.

Mesozoic Dweller - Paras
Dinosaur / Pendulum / Effect
Earth / LVL 5 / Scale 1 / 2000/1500

Pendulum Effect: Once per turn, when a Spell/Trap would be activated, destroy this card and if you do, negate the activation and destroy it.

Monster Effect:
If your opponent controls a monster and you control no monster, Special Summon this card from your hand.

Mesozoic Dweller - Segnos
Dinosaur / Pendulum / Tuner / Effect
Earth / LVL 3 / Scale 7 / 1300/1500
Pendulum Effect: Once per turn, you can draw 1 card

Monster Effect:
When your opponent makes a direct attack, Special Summon this card and end the Battle Phase. Immediately after that, Synchro Summon using monsters you control as Synchro materials

Extra Deck:

Mesozoic Raider - Carnoto
Dinosaur / Xyz / Effect
WIND / RNK4 2500/2000

2 Level 4 Monsters
Detach 1 overlay unit to target 1 monster your opponent controls, switch it to face-up defense position and if you do, this card can attack your opponent directly this turn.

Mesozoic Raider - Jera
Dinosaur / Synchro / Effect

WIND / LVL7 2500/2100

1 Tuner + 1 or more non-Tuner monster

When this card is Special Summoned, target 1 monster in either player's graveyard and equip it to this card, this card then gains attack equal to equipped monster. If this card would be removed from the field, remove the equipped card instead.

Mesozoic Predator - Quetzal
Fusion / Dinosaur / Effect
WIND / LVL10 3300/2800

1 "Mesozoic" monster + 1 Synchro or Xyz monster

Must be Fusion Summoned and can't be summoned by any other ways. This card gains effect depending on the fusion material used to it.

●"Raider" monster: This card can attack your opponent directly, but it's ATK is halved
●"Swimmer" monster: target 1 monster in the field, it's ATK and DEF becomes zero and this card gains halve of the lost ATK
●"Dweller" monster: Special summon 1 monster from your hand or graveyard.