Mermail Synchro: deck recipe [Nov 2020]

To be an effective Synchro Deck you'll need suitable Tuners. Preferably Tuners that can inherently enable synchro plays, such as Deep Sea Diva, by Special Summoning your non-Tuners. Summon Deep Sea Diva, Special Summon Atlantean Marksman then make Crystron Ametrix.

Graydle Slime Jr. can float into another copy of itself so it has the ability to keep a Tuner on the field. You can pair it with Abysspike to make a Brionac. Or more importantly, you can use Territory of the Sharks then pair Graydle Slime Jr. with any WATER monster to make Graydle Dragon. You can activate Territory of the Sharks twice per Duel, just enough to make two Graydle Dragons.

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.

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.

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. Use Abyssmegalo’s effect to search Abyss-sphere.

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.

Abyssgunde is fairly simple, discard her and revive a Mermail monster. Revive Abyssmegalo for a beater, or you can revive Abysspike for its Deck cycling effect.

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.

Heavy Infantry's extra Normal Summon effect lets you get more monsters on board where they can be used as Synchro material. You can Normal Summon Deep Sea Diva with this effect and let Deep Sea Diva fetch an Atlantean.

Between your discard costs and making Synchro Summons, you'll be losing a lot of resources. Run Salvage as a way to help you get back some spent resources.

Mermails is mainly an offense type of Deck and doesn't have much in terms of effect negation. Run Fiendish Chain as a tech against a monster heavy meta. Fiendish Chain can shut down threats such as Desperado Barrel Dragon and enemies' main combos,

Needle Ceiling offers powerful mass removal which is quite effective because almost no one puts monsters face-down nowadays. After getting rid of all enemy monsters, you can then follow up with an OTK with Abyssmegalo. Destroy your own Abysslinde with Needle Ceiling to combo into Abyssmegalo.

Brionac lets you get rid of multiple enemy cards by also discarding as many cards as cost. This effect can even be used to clear your opponent's entire field. You can discard Atlantean monsters as cost for Brionac's effect for extra destructive power.

Upon Normal Summoning, Graydle Dragon will allow you to destroy two enemy cards. This should be good enough to break the opponent's setup and put them in a bad spot.

Graydle Dragon's floating effect is also quite powerful, effectively letting you revive anything in this Deck, including Extra Deck monsters. If you have another copy of Graydle Dragon in the graveyard, you can choose that as revival target to have constant field presence.

The most powerful monsters are usually Special Summoned. So upon summoning Ametryx, you'll be changing the enemy boss monster to defense position. And in most cases this will allow you to attack over their weak DEF stat.

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.

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.

• If you’re going 2nd, your opponent can prevent you from Synchro Summoning by flipping your monsters face-down (Floodgate Trap Hole and Paleozoic Canadia), destroying them (Treacherous Trap Hole).
• Mermails are still fragile and can get OTKed by aggressive decks. Even if you open with Abysslinde or Abyss-sphere, you are not guaranteed to survive until your next turn.

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