My Legendary Ocean deck

[Kamiyama]

I love this. Except when I get bricked, and then I hate it. Given the probability to draw Legendary Ocean, you would think it would brick less. But it happens.

I've been using this through every campaign mode. Beaten nearly every duelist with it. The core synergy is Legendary Ocean + Sea Stealth Attack + lots of 5-star water monsters. You can substitute nearly everything else, but you need at least that.

I've been tweaking it as I progress through the campaigns and unlock more cards. This is what I've settled on so far.

https://steamcommunity.com/sharedfiles/filedetails/?id=3446821377

20 monsters:
3x Deepsea Warrior - Mai Valentine booster
3x Mecha Sea Dragon Plesion - Shark booster
3x Numen Erat Testudo - Cathy Katherine booster
3x The Legendary Fisherman - Mai Valentine booster
3x The Legendary Fisherman II - Mai Valentine booster
2x The Legendary Fisherman III - Mai Valentine booster
3x Warrior of Atlantis - Bakura booster

14 spells:
3x A Legendary Ocean - Mai Valentine booster
3x Different Dimension Capsule - Jaden Yuki booster
1x Gold Sarcophagus - Yugi booster
3x Pot of Duality - Grandpa Muto booster
3x Pot of Extravagance - Blue Angel booster
1x Terraforming - Grandpa Muto booster

6 traps:
3x Sea Stealth Attack - Mai Valentine booster
3x Tornado Wall - Mai Valentine booster

Extra Deck:
3x Castel, the Skyblaster Musketeer - challenge Pegasus
3x Evigishki Merrowgeist - Shark booster
3x Number 101: Silent Honor ARK - challenge Joey
3x Number 106: Giant Hand - Shark booster
3x Number 70: Malevolent Sin - Shark booster

[Kamiyama]

So I'm trying to work with probability here and increase my chances to draw my key cards. First off, it has 6 pot cards, extravagance and duality. These basically reduce the effective number of cards in the deck to 34. What's cool is you can use extravagance and duality on the same turn, because duality excavates cards and is not technically a "draw".

You have 7 cards that get you Legendary Ocean. that's 7/34, or roughly a 20% chance. Warrior of Atlantis and Terraforming will also get you Legendary Ocean instantly.

On top of that, you have 4 generic card searchers in Gold Sarco and DDC. These take 2 turns to work. I like to use these to draw Sea Stealth Attack, but can be used to draw something else if you have SSA in play already. Again this amounts to roughly a 20% chance to get SSA.

15 different 5-star water monsters that can trigger SSA, but you need Legendary Ocean in play to actually summon them. Then two 7-star Legendary Fisherman III that can banish all enemy monsters when it comes into play. These can also trigger SSA.

Tornado Wall makes your life points immune to combat damage. So that's nice. But it doesn't work against card effects.

The Extra Deck is stuffed full of cards that can help you deal with things that can't be outright destroyed by SSA. Like Timelords. Castel can force monsters into face-down defense mode. Number 101 can attach enemy monsters as material. Number 106 can disable the effects of enemy monsters. Number 70 can temporarily banish them. All of these things are not "destruction" so they can work around immunity to destruction.

The Evigishki Merrowgeist can be used to shuffle a Legendary Fisherman III back into your deck, giving you the possibility to summon it again and banish more enemy monsters. It's a roundabout way to do things but Legendary Fisherman III has a powerful ability that is maybe worth it. Banishing all enemy monsters on the field is worse than Raigeki, which just sends them to the GY.

But in the vast majority of matches, the extra deck is just fuel for pot of extravagance. Keep in mind XYZ monsters do not have a level, and do not trigger SSA. The only time they should be used is to get rid of things that SSA can't take down.

[Kamiyama]

Generally if I can get Legendary Ocean in play my first turn, I have a good chance to pull off a win. If I can't do that, then I get bricked and end up losing.

Love/hate. In most games it steamrolls over the AI. The only thing that you have to watch out for is spell removal like mystical space typhoon. However if you activate Sea Stealth Attack to banish 1 of your monsters for 1 turn, it will protect your spells and traps that turn. This is really useful and makes this strat much less frustrating to pull off. The trick is actually getting SSA in play, and because it's a trap you have to activate it during the enemy turn. Also it has to be active (face up) BEFORE you use it to protect your spell cards. You can't flip it and then activate its ability in response to a spell remover.

It's also a tad annoying to have it ask you if you want to activate a trap so many times during the enemy turn. But it's instant monster destruction, basically making your monsters invulnerable to combat damage and giving them 1-hit kills in combat. I can't complain.

[Kamiyama]

Note that while I'm creaming most the campaign mode duelists, challenges are a different beast entirely. I've beaten some of the challenges with this but they are definitely more difficult.

Also Zone's timelord deck required multiple attempts. I was eventually able to beat him by using Legendary Fisherman III to banish some of his timelords. I wouldn't say this is the ideal deck to beat him and there are no doubt better decks to counter timelords. But I managed to do it with this one with some difficulty.

All in all, I think it's a great starter deck. It needs mostly cards from Mai Valentine and Shark. If you get their cards plus some generics from Yugi and Grandpa Muto, you can probably throw this together with some substitutes.

[Kamiyama]

https://steamcommunity.com/sharedfiles/filedetails/?id=3450920356

^ won that one 8000 to 0. His last 1000 life points he lost himself paying upkeep for one of his continuous spells.