アビスカイト・ディープシールド Abysskite Deepshield
Normal Trap Card
【REQUIREMENT】 When your opponent monster Normal Summons a monster.
【EFFECT】 During this turn, your opponent cannot add a monster from the GY to the hand. If you control a face-up Sea Serpent monster, then, during this turn, your opponent cannot Special Summon a monster from the GY.

アビスレイヤー・トリトン Abysslayer Triton
Level 1 DARK Sea Serpent Effect Monster
ATK 500
DEF 500
【REQUIREMENT】 None
【EFFECT】 Send the top card of your Deck to the GY. If you sent a Sea Serpent monster to the GY with this effect, then, you can choose 1 Maximum Monster in your GY and add it to the hand.

アビスレイヤー・クインティアマット Abysslayer Quintiamat
Level 7 DARK Sea Serpent Effect Monster
ATK 2500
DEF 0
【REQUIREMENT】 Shuffle up to 3 Sea Serpent monsters, including a Maximum Monster, from your GY back into the Deck.
【EFFECT】 Draw 1 card, then, you can excavate the top 5 cards of your Deck. If you excavate them, reveal them to your opponent. You can choose up to 3 Level 7 or higher Sea Serpent monsters among them, and shuffle the remaining cards back into the Deck.

Note: Quintet + Tiamat (The primordial salt water ocean who turned herself into a dragon).

アビス・フルカウンター Abyss Full Counter
Normal Trap Card
【REQUIREMENT】 When an opponent’s monster declares an attack on a face-up Sea Serpent monster you control.
【EFFECT】 Shuffle all Sea Serpent monsters in your GY back into the Deck. The attacked monster gains 100 ATK x the number of monsters returned to the Deck with this effect.

Source