KOG Crystron SSA Deck by BlueDelta on Nov 30, 2020

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Crystrons are by far the most complex archetype Duel Links currently has to offer, offering access to quick-play (Spell-Speed 2) Synchro options during your opponent’s main phase or battle phase and two skills supporting it.

Mystic Depths or Level Duplication?

Mystic Depths directly supports Citadel Whale and Sea Stealth Attack, removing the need to include Umi (or any other spell / trap that counts as umi on the field). Level Duplication allows you to copy the level of a monster in your hand to anyone on your side of the field, giving you more options with your Synchro plays, most notably to turn a monster into level 3 to Special Summon Psychic Wheeleder.

Level Duplication makes OTK’s easier in certain scenarios, but Mystic Depths allows you to exert more control over the board and enables various plays utilizing Sea Stealth Attack.

The main drawback of SSA lies in the inherent danger of Umi getting hit by a Cosmic Cyclone, thus disabling the combo, the worst case scenario that can occur. But even in this type of situation you will still be able to use SSA as a target for the destruction effect of your Crystron monsters instead of destroying the monster activating its effect, allowing you to get more monsters onto the field for your Synchro plays. However not every deck runs Cosmic Cyclones (e.g. Shiranui bring triple Spectralsword most of the time) and even if it does, it’s not always guaranteed your opponent pulls one in their starting hand.

With the disadvantages addressed, Whale + SSA bring the following benefits to your board:

Citadel Whale can protect ANY Water monster from single targeting effects (e.g. Karma Cut).
Unlike with Synchro or XYZ summons, Citadel Whale can also use facedown defense position monsters for its Special Summon. This aspect is extremely important, as you can clear your board of monsters hit by Floodgate Trap Hole. Plus, if your monsters are bound by Fiendish Chain you can simply tribute them off, unclogging your board and also clogging up your opponent’s backrow with a card that has no further use.

SSA automatically destroys enemy monsters at the start of the damage step, if you battle with a level 5 or higher Water monster, which includes Sulfefnir, Citadel Whale and all your Water Synchro monsters, also bypassing all flip effects and effects upon flipping up a monster.

Permanent ATK or DEF reductions can be reset by banishing the corresponding monster.

You can save your level 4 or lower Water monster simply by banishing it.

You can combine Tuners with SSA: For example, you can use Citree + Sulfefnir to Synchro Summon Samurai Destroyer, but banish Citree before the Synchro Summon takes place. You will have Sulfefnir on the board with Citree being banished (which returns in the end phase), giving you decent protection and plenty of follow-up plays for your turn.

In a Citadel Whale version, it is highly recommended to run Genex Undine in addition to Scrap Recycler. Aside from Crystron Monsters, it can also pitch Citadel Whale into your graveyard. However, you will only be able to use its effect, if you still have copies of Genex Controller in your main deck, which is why i included two of those.

Its drawback aside, Genex Undine is the better "searcher" because it can send both Crystrons and Citadel Whale to the graveyard, plus you get to add Genex Controller to your hand. Crystrons have several ways to Special Summon monsters, which is why having a simple level 3 normal tuner in your hand is actually not a bad thing.

I geared my Extra Deck more towards Machine-Type Synchro Monsters because it gives you more options both for your turn and during your opponent’s turn. During your turn you can only Special Summon Machine-Type Synchro Monsters after using the destruction effects of any of the following Crystron monsters: Thystvern, Smiger, Rosenix, Prasiortle. Having too many non-Machine type Synchro monsters can hinder the Synchro plays during your turn. Additionally, you will have more options for Quick-Play Synchros during your opponent’s turn.

I specifically left out Black Rose Dragon. The board wipe is a very powerful tool, but conflicts with SSA+ Umi, because you cannot protect them from destruction caused by your own card effects.

Brionac, Dragon of the Ice Barrier’s main purpose is to return monsters to the hand. Hardly useful versus backrow since it simply can be set again next turn. Probably better suited for a Level Duplication build, since that Skill focuses more on OTK.

I included Powered Inzektron, because it supports Crystrons nicely as it is a Machine-Type Synchro. If you feel like Ametrix won’t be enough to protect you, you can set up a Powered Inzektron Synchro Summon for your opponent’s turn, which eliminates any danger of taking lethal damage.

Coral Dragon gives you access to single-target destruction and can easily be used to extend your Synchro plays to either of the following monsters, plus you get to draw a card. :

1. Samurai Destroyer (Coral Dragon + Rosenix Token)
   
   
2. Vermillion Dragon Mech (Coral Dragon + any Level 3 non-Tuner monster).
   
   
3. Crystron Quariongandrax (Coral Dragon+ Crystron Citree + Rosenix Token)

Due to it being a Water monster, it also profits from SSA + Umi being on the board.

Vermillion Dragon Mech gives you further access to targeting card destruction, but uses different resources than Coral Dragon, promoting the synergy between the two. You can even Special Summon it as a Quick-Play Synchro with Rion if Powered Inzektron is banished or with Citree if Samurai Destroyer is present in the graveyard.

Crystron Quariongandrax is one of your most powerful options you can bring to the board. Even so, you should carefully think about when to summon it, since it can disrupt the opponent’s graveyard enabling you to banish cards like Shirunai Spectralsword. However if the deck you are facing has no strong graveyard set-up, feel free to exclusively use it versus monsters on the board.

You can summon it via the following level combos:

1. 1+2+6 (Rosenix Token + Citree + Coral Dragon)
   
   
2. 2+2+5 (Citree + Citree + Sulfenir)
   
   
3. 2+3+4 (Citree + Tuner + Rosenix)
   
   
4. 3+3+3 (Tuner + Tuner + Non-Tuner)

As for the level 3 Tuners you have the following options to fill the spot(s): Genex Controller, Psychic Wheeleder and / or Crystron Rion.

While it is a very powerful archetype, it is probably one of the most expensive ones to play and it takes time to learn the combos and most importantly, speed up your plays as much as possible, so you won’t lose to the countdown timer instead of actually getting beaten by your opponent. Invoker is definitely the hardest match-up, due to the inherent danger of Crystrons in the graveyard being banished, who are vital for your plays plus Cocytus is hard to deal with. Caution is advised before jumping into this archetype before considering the circumstances.

This archetype has already faced one nerf, with 2 cards sharing a spot on the semi-limited list, plus it’s not as common as certain other metadecks due to its complexity. I cannot imagine a follow-up nerf coming anytime soon, but take this guess with a grain of salt.

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