Mermail Abyssmegalo

Sea Serpent/Effect

You can discard 2 other WATER monsters to the Graveyard; Special Summon this card from your hand. When you do: You can add 1 "Abyss-" Spell/Trap Card from your Deck to your hand. You can Tribute 1 other face-up Attack Position WATER monster; this card can make a second attack during each Battle Phase this turn.

Mermail Abyssleed

Sea Serpent/Effect

You can discard 3 other WATER monsters to the Graveyard; Special Summon this card from your hand. When you do: You can target 1 "Abyss-" Spell/Trap Card in your Graveyard; add that target to your hand. You can Tribute 1 other face-up Attack Position "Mermail" monster; send 1 random card from your opponent's hand to the Graveyard. You can only use this effect of "Mermail Abyssleed" once per turn.

Mermail Abyssteus

Aqua/Effect

You can discard 1 other WATER monster to the GY; Special Summon this card from your hand. If Summoned this way: Add 1 Level 4 or lower "Mermail" monster from your Deck to your hand. You can only use this effect of "Mermail Abyssteus" once per turn.

Mermail Abyssbalaen

Aqua/Effect

You can discard 4 other "Mermail" monsters to the Graveyard; Special Summon this card from your hand. When you do: Target cards your opponent controls, up to the number of "Mermail" monsters in your Graveyard (if possible); this card gains 500 ATK, and if it does, destroy thos targets (if any). You can Tribute 1 other face-up Attack Position "Mermail" monster; this card gains the following effect this turn. // * At the start of the Damage Step, if this card battles a Defense Position monster. Destroy that monster.

Mermail Abyssdine

Aqua/Effect

When this card is added from your Deck or Graveyard to your hand by a card effect, if you control a face-up "Mermail" monster: You can Special Summon this card from your hand. When this card is Special Summoned by the effect of a "Mermail" monster: You can target 1 Level 3 or lower "Mermail" monster in your Graveyard; Special Summon that target. You can only use the effect of "Mermail Abyssdine" once per turn.

Mermail Abyssgunde

Aqua/Effect

If this card is discarded to the Graveyard: You can target 1 "Mermail" monster in your Graveyard, except "Mermail Abyssgunde"; Special Summon that target. You can only use the effect of "Mermail Abyssgunde" once per turn.

Mermail Abysshilde

Aqua/Effect

If this card is sent to the Graveyard: You can Special Summon 1 "Mermail" monster from your hand, except "Mermail Abysshilde". You can only use the effect of "Mermail Abysshilde" once per turn.

Mermail Abysslung

Fish/Effect

Your opponent's monsters cannot target other face-up WATER monsters you control for attacks. All WATER monsters you control gain 300 ATK.

Mermail Abyssnose

Fish/Effect

When this card destroys an opponent's monster by battle and sends it to the Graveyard: You can discard 1 WATER monster to the Graveyard; Special Summon 1 "Mermail" monster from your Deck in face-up Defense Position. You can only use the effect of "Mermail Abyssnose" once per turn.

Mermail Abysslinde

Aqua/Effect

If this card on the field is destroyed and sent to the Graveyard: You can Special Summon 1 "Mermail" monster from your Deck, except "Mermail Abysslinde". You can only use the effect of "Mermail Abysslinde" once per turn.

Deep Sea Diva

Sea Serpent/Tuner

When this card is Normal Summoned: You can Special Summon 1 Level 3 or lower Sea Serpent-Type monster from your Deck.

Abyss-scale of Cetus

Equip only to a "Mermail" monster. It gains 800 ATK. When the effect of a Trap Card that was activated on your opponent's side of the field resolves, negate that effect, then send this card to the Graveyard.

Abyss-scale of the Kraken

Equip only to a "Mermail" monster. It gains 400 ATK. Negate any monster effect that activates on your opponent's side of the field, and if you do, send this card to the Graveyard.

Abyss-scale of the Mizuchi

Equip only to a "Mermail" monster. It gains 800 ATK. When a Spell effect that was activated on your opponent's side of the field resolves, negate that effect, then send this card to the Graveyard.

Pacifis, the Phantasm City

(This card's name is always treated as "Umi".)
You cannot Normal or Special Summon Effect Monsters the turn you activate either of this card's effects (even if this card leaves the field). Once per turn, if you Normal or Special Summon exactly 1 Normal Monster (and no other cards): Add 1 "Phantasm Spiral" card from your Deck to your hand. If your opponent activates a card or effect (except during the Damage Step), and you control no Tokens: You can Special Summon 1 "Phantasm Spiral Token" (Wyrm-Type/WATER/Level 8/ATK 2000/DEF 2000).

Rank-Up-Magic Barian's Force

Target 1 face-up Xyz Monster you control; Special Summon from your Extra Deck, 1 "Number C" or "CXyz" monster with the same Type as that monster you control but 1 Rank higher, by using it as the Xyz Material. (This Special Summon is treated as an Xyz Summon. Xyz Materials attached to that target also become Xyz Materials on the Summoned monster.) Then, if possible, detach 1 Xyz Material from a monster your opponent controls and attach it to the Summoned monster as an Xyz Material.

Mermail Abyssgaios

Aqua/Xyz/Effect

While this face-up card has Xyz Material, Level 5 or higher monsters cannot attack. Once per turn, during either player's turn: You can detach 1 Xyz Material from this card; negate the effects of all face-up monsters your opponent currently controls that have less ATK than this card, until the end of the turn.

Mermail Abysstrite

Sea Serpent/Xyz/Effect

3 Level 3 monsters // During either player's turn, when your opponent targets exactly 1 face-up "Mermail" monster you control for an attack, or with a Spell/Trap effect that could have targeted this card (except during the Damage Step): You can detach 1 Xyz Material from this card; that attack

Mermail Abyssalacia

Sea Serpent/Link/Effect

Monsters this card points to gain 500 ATK/DEF. You can only use each of the following effects of "Mermail Abyssalacia" once per turn. ? During your opponent's turn (Quick Effect): You can send 1 card from your hand to the GY; add 1 "Mermail" monster from your Deck to your hand. ? If this card in its owner's possession is destroyed by an opponent's attack or card effect: You can send 1 WATER monster from your Deck to the GY, then target 1 WATER monster in your GY; Special Summon it in Defense Position.

Abyss Dweller

Sea Serpent/Xyz/Effect

2 Level 4 monsters
While this card has an Xyz Material attached that was originally WATER, all WATER monsters you control gain 500 ATK. Once per turn, during either player's turn: You can detach 1 Xyz Material from this card; any card effects that activate in your opponent's Graveyard cannot be activated this turn.

Number 73: Abyss Splash

Warrior/Xyz/Effect

2 Level 5 WATER monsters Once per turn, during either player's turn: You can detach 1 Xyz Material from this card; double this card's ATK until the end of your opponent's turn, also, any battle damage it inflicts to your opponent this turn is halved.

Number C73: Abyss Supra Splash

Warrior/Xyz/Effect

3 Level 6 monsters If a monster you control battles an opponent's monster, during damage calculation (in either player's turn): You can detach 1 Xyz Material from this card once per battle; your battling monster gains ATK equal to the ATK of the opponent's monster it is battling, during that damage calculation only. If this card has "Number 73: Abyss Splash" as Xyz Material, it gains this effect. ? This card cannot be destroyed by card effects.

Number 17: Leviathan Dragon

Dragon/Xyz/Effect

2 Level 3 monsters
Once per turn: You can detach 1 Xyz Material from this card; this card gains 500 ATK. If this card has no Xyz Material, it cannot attack your opponent directly.