WATER 4

All Level 3 or lower Sea Serpent-Type monsters you control can attack your opponent directly. When this card is sent to the Graveyard to activate a WATER monster's effect: Add 1 Sea Serpent-Type monster from your Deck to your hand, except "Atlantean Dragoons".

WATER 2

During your Main Phase, you can Normal Summon 1 Level 4 or lower Sea Serpent-Type monster in addition to your Normal Summon/Set. (You can only gain this effect once per turn.) When this card is sent to the Graveyard to activate a WATER monster's effect: Target 1 face-up card your opponent controls; destroy that target.

WATER 3

When this card inflicts battle damage to your opponent: You can Special Summon 1 Level 4 or lower "Atlantean" Sea Serpent-Type monster from your Deck, except "Atlantean Marksman". When this card is sent to the Graveyard to activate a WATER monster's effect: Target 1 Set card your opponent controls; destroy that target.

WATER 3

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.

WATER 7

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

WATER 4

When this card is Normal or Special Summoned: You can discard 1 WATER monster to the Graveyard; add 1 Level 3 WATER monster from your Deck to your hand. You can only use this effect of "Mermail Abysspike" once per turn.

WATER 7

You can discard 1 other WATER monster to the GY; Special Summon this card from your hand. When Summoned this way: You can 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.

WATER 1

You can send 1 "Atlantean" monster from your Deck to the Graveyard, except "Neptabyss, the Atlantean Prince"; add 1 "Atlantean" card from your Deck to your hand, except "Neptabyss, the Atlantean Prince". If this card is sent to the Graveyard to activate a WATER monster's effect: Target 1 "Atlantean" monster in your Graveyard, except "Neptabyss, the Atlantean Prince"; Special Summon it. You can only use each effect of "Neptabyss, the Atlantean Prince" once per turn.

WATER 2

You can Special Summon this card (from your hand) by discarding 1 other WATER monster. When this card is Summoned: You can send 1 Level 2 or lower WATER Aqua monster from your Deck or face-up field to the GY. Once per turn: You can return 1 monster you control to the hand; you can Normal Summon 1 "Frog" monster during your Main Phase this turn, except "Swap Frog", in addition to your Normal Summon/Set. (You can only gain this effect once per turn.)

WATER

2 Fish, Sea Serpent, and/or Aqua monsters 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.

WATER

2 WATER monsters All WATER monsters on the field gain 500 ATK and DEF, also all FIRE monsters on the field lose 400 ATK and DEF. If this card is destroyed by battle or card effect: You can target 1 WATER monster in your GY; add it to your hand. You can only use this effect of "Mistar Boy" once per turn.

WATER 6

1 Tuner + 1+ non-Tuner monsters You can discard any number of cards to the GY, then target the same number of cards your opponent controls; return those cards to the hand. You can only use this effect of "Brionac, Dragon of the Ice Barrier" once per turn.

WATER 5

1 Tuner + 1 or more non-Tuner monsters If this card is Synchro Summoned: You can change all face-up Special Summoned monsters your opponent controls to Defense Position. If this Synchro Summoned card is destroyed by battle or card effect: You can target 1 "Crystron" monster in your Graveyard, except a Synchro Monster; Special Summon it.

WATER 9

1 Tuner Synchro Monster + 1 or more non-Tuner Synchro Monsters If this card is Synchro Summoned: You can banish all Spell and Trap Cards your opponent controls and in their Graveyard. If this Synchro Summoned card is destroyed by battle or card effect: You can target 1 other monster in your Graveyard; Special Summon it.

WATER 9

2 or more Tuners + 1 non-Tuner monster If this card is Synchro Summoned: You can target monsters your opponent controls and/or in their Graveyard, up to the number of Synchro Materials used for the Synchro Summon of this card; banish them. If this Synchro Summoned card is destroyed by battle or card effect: You can target 1 banished monster, except this card; Special Summon it to your field.

WATER 6

1 Tuner + 1 or more non-Tuner WATER monsters Once per turn, you can return any number of face-up cards you control to the owner's hand. For each card returned to the owner's hand by this effect, this card gains 500 ATK until the End Phase.

WATER 7

1 Tuner + 1 or more non-Tuner WATER monsters Once per turn: You can discard up to 2 cards to the Graveyard to target the same number of cards your opponent controls; destroy them.

WATER 9

1 Tuner + 2+ non-Tuner monsters When this card is Synchro Summoned: You can banish up to 1 card each from your opponent's hand, field, and GY. (The card in the hand is chosen at random.)

WATER 11

1 Tuner + 2+ non-Tuner monsters When this card is Synchro Summoned: You can banish up to 3 cards your opponent controls. If this Synchro Summoned card in its owner's control is destroyed by an opponent's card: You can Special Summon 1 "Trishula, Dragon of the Ice Barrier" from your Extra Deck or GY, its ATK becomes 3300, then halve the ATK of any face-up monsters your opponent currently controls, also negate their effects. You can only use this effect of "Trishula, Zero Dragon of the Ice Barrier" once per turn.

WATER 6

1 Tuner + 1+ non-Tuner monsters Once per turn: You can discard 1 card, then target 1 card your opponent controls; destroy it. If this Synchro Summoned card is sent from the field to the GY: You can draw 1 card. You can only use this effect of "Coral Dragon" once per turn.

WATER 4

1 Tuner + 1+ non-Tuner monsters Once per Chain, during your opponent's Main or Battle Phase, you can (Quick Effect): Immediately after this effect resolves, Synchro Summon 1 Synchro Monster, using materials including this card you control. If this Synchro Summoned card is destroyed by battle or card effect: You can target 1 "Crystron" monster in your GY, except a Synchro Monster; Special Summon it.

WATER 5

"Deep Sea Diva" + 1+ non-Tuner monsters Once per turn (Quick Effect): You can discard 1 Level 4 or lower WATER monster; this card gains 800 ATK until the end of this turn. If this Synchro Summoned card is sent to your GY: You can target 1 Level 5 or higher WATER monster in your GY, except "Deep Sea Repetiteur"; Special Summon it in Defense Position, also you cannot Special Summon monsters for the rest of this turn, except WATER monsters. You can only use this effect of "Deep Sea Repetiteur" once per turn.

WATER 3

1 Tuner + 1+ non-Tuner monsters If this Synchro Summoned monster would be used as a Synchro Material, 1 monster in your hand can be used as 1 of the other materials. Unaffected by other monsters' effects.

WATER 2

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

WATER 3

You can discard this card and 1 WATER monster; look at your opponent's hand and banish 1 card from their hand face-up, until the End Phase. If this card is Special Summoned: You can send the top 3 cards of your Deck to the GY, then target 1 Level 4 or lower WATER monster in your GY, except "Deep Sea Minstrel"; place it on the top or bottom of the Deck. You can only use each effect of "Deep Sea Minstrel" once per turn.

WATER 5

If this card is added from the Deck to your hand: You can reveal this card; Special Summon it. If this card is added from your GY to your hand by a card effect: You can reveal this card; Special Summon this card, but banish it when it leaves the field. You can only use 1 "Lappis Dragon" effect per turn, and only once that turn.

Spell Equip

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

Spell Equip

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.

Spell Normal

Shuffle 2 WATER monsters from your hand into the Deck, then draw 3 cards.

Spell Normal

Target 5 monsters in your GY; shuffle all 5 into the Deck, then draw 2 cards.

Trap Normal

Apply these effects, in sequence, depending on the number of "Ice Barrier" Synchro Monsters you control with different names; ● 1+: Banish 1 card your opponent controls. ● 2+: Banish 1 card from your opponent's GY. ● 3+: Banish 1 random card from your opponent's hand. When your opponent activates a card or effect that targets an "Ice Barrier" Synchro Monster(s) you control: You can banish this card from your GY; negate that effect. You can only use each effect of "Terror of Trishula" once per turn.

WATER 1

You can send 1 "Atlantean" monster from your Deck to the Graveyard, except "Neptabyss, the Atlantean Prince"; add 1 "Atlantean" card from your Deck to your hand, except "Neptabyss, the Atlantean Prince". If this card is sent to the Graveyard to activate a WATER monster's effect: Target 1 "Atlantean" monster in your Graveyard, except "Neptabyss, the Atlantean Prince"; Special Summon it. You can only use each effect of "Neptabyss, the Atlantean Prince" once per turn.

WATER

2 Fish, Sea Serpent, and/or Aqua monsters 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.

WATER 6

1 Tuner + 1+ non-Tuner monsters You can discard any number of cards to the GY, then target the same number of cards your opponent controls; return those cards to the hand. You can only use this effect of "Brionac, Dragon of the Ice Barrier" once per turn.

WATER 9

2 or more Tuners + 1 non-Tuner monster If this card is Synchro Summoned: You can target monsters your opponent controls and/or in their Graveyard, up to the number of Synchro Materials used for the Synchro Summon of this card; banish them. If this Synchro Summoned card is destroyed by battle or card effect: You can target 1 banished monster, except this card; Special Summon it to your field.

WATER 7

1 Tuner + 1 or more non-Tuner WATER monsters Once per turn: You can discard up to 2 cards to the Graveyard to target the same number of cards your opponent controls; destroy them.

WATER 9

1 Tuner + 2+ non-Tuner monsters When this card is Synchro Summoned: You can banish up to 1 card each from your opponent's hand, field, and GY. (The card in the hand is chosen at random.)

WATER 11

1 Tuner + 2+ non-Tuner monsters When this card is Synchro Summoned: You can banish up to 3 cards your opponent controls. If this Synchro Summoned card in its owner's control is destroyed by an opponent's card: You can Special Summon 1 "Trishula, Dragon of the Ice Barrier" from your Extra Deck or GY, its ATK becomes 3300, then halve the ATK of any face-up monsters your opponent currently controls, also negate their effects. You can only use this effect of "Trishula, Zero Dragon of the Ice Barrier" once per turn.