The 21st Main Box Cybernetic Rebellion is bringing Mermails exactly what they have been looking for since their introduction in Duel Links: a Turn 1 play. Mermail Abysslinde and Abyss-sphere are two incredible cards that allow you to Special Summon any “Mermail” monster directly from your Deck, giving you direct access to anything you need.
|Territory of the Sharks|
The Level of all WATER monsters you control becomes 4 until the end of the turn. This Skill can only be used once per turn and twice per Duel. This Skill can only be used if you beign the Duel with a Deck/Extra Deck that contains no monsters other than WATER monsters.
Use Abyss-sphere to Special Summon Mermail Abysslinde. If Abyss-sphere leaves the field, Abysslinde will be destroyed and it will allow you to Special Summon a “Mermail” monster from your Deck. Even if nothing happens to Abyss-sphere, during the next End Phase of your opponent’s turn after its activation, the Continuous Trap will destroy itself.
Keep in mind that, if your opponent responds to the activation of Abyss-sphere by activating Cosmic Cyclone, banishing the Continuous Trap, you don’t get to Special Summon any monster.
Abysslinde is a good monster to Special Summon with Abyss-sphere because it lets you float into something more permanent. Instead of summoning Abyssmegalo with Abyss-sphere which will self destruct, Special Summon Abysslinde then use Abysslinde's effect to Special Summon Abyssmegalo.
You also can use Mermail Abysslinde’s effect to Special Summon Mermail Abysspike and then use Abysspike’s effect to add a Level 3 WATER monster from your Deck to your hand.
|WATER Sea Serpent ★7|
ATK 2400 / DEF 1900
|Gaia Genesis [UR]|
|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.|
You can Special Summon Mermail Abyssmegalo from your hand by discarding two WATER monsters. By discarding Atlantean Marksman, Heavy Infantry or Mermail Abyssgunde, you can get back some value from the resources you’ve invested to Summon Abyssmegalo.
When it’s Special Summoned by its own effect, Mermail Abyssmegalo allows you to add an “Abyss-” Spell/Trap Card from your Deck to your hand.
You can use Abyssmegalo’s effect to search Abyss-sphere or any of the Abyss- equips.
|WATER Aqua ★7|
ATK 1700 / DEF 2400
|Cybernetic Rebellion [UR]|
|You can discard 1 other WATER monster to the Graveyard; Special Summon this card from your hand. When you do: 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.|
Unlike Abyssmegalo, Abyssteus requires you to discard only one WATER monster in order to be Summoned and, to make it even more cost-efficient, it also allows you to add a Level 4 or lower “Mermail” monster from your Deck to your hand when it’s Summoned this way. Effectively, you summon it for no resource loss, and you can even gain advantage with the discarded monster's effect.
You can summon Mermail Abysspike, discard Abyssgunde, Special Summon Mermail Abyssmegalo from your Graveyard and then tribute Abysspike to give Abyssmegalo a second attack.
The discard cost on this low-level monster is one of the more versatile ways you can activate the effect of Abyssgunde and Atlanteans. This is because Abysspike's effect also activates when Special Summoned by Abyss-sphere and Abysslinde so you can use Atlanteans' removal during the opponent's turn.
Atlantean monsters are meant to be used as cost for your discard effects. When used this way their removal effects are also triggered. Atlantean Marksman is used to destroy set cards, while Heavy Infantry is used to destroy face-up cards.
|WATER Sea Serpent ★3|
ATK 1400 / DEF 0
|Gaia Genesis [SR]|
|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.|
Atlantean Heavy Infantry
|WATER Sea Serpent ★2|
ATK 0 / DEF 1600
|Gaia Genesis [SR]|
|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.|
Atlantean Heavy Infantry's extra Normal Summon effectively lets you make Xyz monsters. Summon another Atlantean after Heavy Infantry, activate Territory of the Sharks then make a Rank-4.
You'll practically always be drawing a bunch of WATER monsters in your starting hand, but what you want is a balance of discard monsters (i.e. Abyssmegalo, Abyssteus) and cost monsters (i.e. Atlanteans, Abyssgunde) so Moray of Greed is used to help you draw a better hand.
Brionac, Dragon of the Ice Barrier
|WATER Sea Serpent ★6|
ATK 2300 / DEF 1400
|Aerial Assault [UR]|
Selection Box Vol.04 [UR]
|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.
Number 37: Hope Woven Dragon Spider Shark
|WATER Fish ★4|
ATK 2600 / DEF 2100
|Shark Fang [UR]|
|2 Level 4 WATER monsters|
When any player's monster declares an attack: You can detach 1 Xyz Material from this card; all monsters your opponent currently controls lose 1000 ATK until the end of this turn. When this card is destroyed by battle or card effect and sent to the Graveyard: You can target 1 other monster in your Graveyard; Special Summon it. You can only use each effect of "Number 37: Hope Woven Dragon Spider Shark" once per turn.
Spider Shark is a powerful boss monster in many WATER Decks, especially ones that use Territory of the Sharks. The Skill makes it very easy to get Spider Shark on the field. The first effect is enough to entirely deter the opponent from attacking while Spider Shark is on the field. It also lets you beatdown enemy monsters even though your deck generally has below average ATK without complete buffs.
The floating effect is essentially a Monster Reborn. You can even revive another copy of Spider Shark and other Extra Deck monsters.
|WATER Sea Serpent ★4|
ATK 1700 / DEF 1400
|Photons of Galaxy [UR]|
|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.
Abyss Dweller is another popular Xyz monster run in Territory of the Sharks Decks. This monster is great at preventing the opponent from using resources from the graveyard such as The White Stone of Ancients and all Noble Arms. But making Spider Shark usually take priority.
Make sure to toggle your chain to "ON" instead of "AUTO" then use Abyss Dweller's effect at the start of the opponent's turn for best results.
Number 47: Nightmare Shark
|WATER Fish ★3|
ATK 2000 / DEF 2000
|Reginald Kastle Unlock Event [UR]|
|2 Level 3 monsters|
When this card is Special Summoned: You can attach 1 Level 3 WATER monster from your hand or your side of the field to this card as an Xyz Material. Once per turn: You can detach 1 Xyz Material from this card, then target 1 WATER monster you control; this turn, that monster can attack your opponent directly, also other monsters cannot attack.
Full Armored Black Ray Lancer
|WATER Beast-Warrior ★4|
ATK 2100 / DEF 600
|Eternal Stream [SR]|
|3 Level 4 WATER monsters|
You can also Xyz Summon this card by using a Rank 3 WATER Xyz Monster you control that has no Xyz Materials as the Xyz Material. This card gains 200 ATK for each Xyz Material attached to it. If this face-up card would be destroyed, you can detach all of its Xyz Materials instead. If this card destroys an opponent's monster by battle: You can target 1 Spell/Trap Card your opponent controls; destroy that target.
|WATER Sea Serpent ★3|
ATK 1600 / DEF 2800
|Shark Fang [R]|
|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/effect now targets this card. When this card is destroyed and sent to the Graveyard: You can target 1 "Mermail" monster in your Graveyard, except "Mermail Abysstrite"; Special Summon that target.
Abysstrite is quite costly to make for its "lightning rod"-like effect. In case of enemy attacks, Abysstrite has a good chance of surviving with its 2800 DEF stat. But against targeting effects, this will most likely destroy Abysstrite because she has no inherent protection. While inefficient, some form of protection is technically better than no protection at all for an Abyssmegalo beside Abysstrite.
And at least she floats when destroyed. You can float into Abysspike, activate its effect and discard an Atlantean to destroy whatever destroyed Abysspike.
Leviathan Dragon is simply a beater that can't attack directly. But its 3000 potential ATK is the strongest in your Deck. You can also keep it at 2500 ATK if you want it to be able to attack directly.
Merrowgeist's effect can be useful to disrupt enemy decks that have a lot of graveyard recursion. But her low ATK makes it difficult for her to actually destroy monsters by battle unless Spider Shark is also on the field.
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