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* [[Pharaonic Guardian]]* [[Invasion of Chaos]]* [[Ancient Sanctuary]]* [[Force of Structure Deck: Fury from the BreakerDeep]]

* [[Retro Pack 2]]* [[Realm of the Sea Emperor Structure Deck]]* [[Battle Pack 3: Monster League]]* [[Legendary Duelists]]* [[Speed Duel: Fury Attack from the Deep]]* [[Maximum CrisisLegendary Duelists: Season 1]]* [[2021 Tin of Ancient Battles]]* [[Magnificent Mavens]]* [[Speed Duel: Streets of Battle City]]| ocg = * [[Starter Box: Theatrical Release]]* [[Starter Box]]* [[Mythological Age]]* [[Duelist Legacy Volume.2]]* [[Duelist Legacy Volume.5]]* [[Beginner's Edition 1]]* [[Beginner's Edition 2]]* [[Beginner's Edition 1 (2011)]]* [[Beginner's Edition 2 (2011)]]* [[Structure Deck: Roar of the Sea Emperor]]* [[Duelist Edition Volume 4]]* [[Duelist Pack: Kastle Siblings]]

* [[Deck Mod Pack: Illusion Strike Mirage Impact!!]]* [[Deck Mod Pack: Chaotic Omega Rising!!]]| anime =

* [[Yu-Gi-Oh! SEVENS]]* [[Yu-Gi-Oh! GO RUSH!!]]| manga =* [[Yu-Gi-Oh! (manga)|Yu-Gi-Oh!]]* [[Yu-Gi-Oh! Duelist]]* [[Yu-Gi-Oh! SEVENS Luke! Explosive Supremacy Legend!!]]

"'''Umi'''" ({{Ruby|海|うみ}} ''Umi'') is a [[series]] of cards focused around the [[Field Spell Card]] "[[Umi]]". The core of the series is a group of [[Field Spell Card]]s that are "[[Umi]]" or are always treated as "Umi". The series features multiple supporting cards who have effects revolving around having a [[face-up]] "Umi" Field Spell. In the ''[[Yu-Gi-Oh! (anime)|Yu-Gi-Oh!]]'' anime, [[Mako Tsunami]] used a [[WATER]] Deck that utilized the [[Ocean]] [[terrain]] and later the "Umi" Field Spell, and has been informally associated with the "Umi" card series. In ''[[Yu-Gi-Oh! SEVENS]]'', there are three users of "Umi"-centric strategies; [[Skipjack]]'s [[Fish]] Deck utilized the Field Spell "[[Big Umi (anime)|Big Umi]]" with all cards that mentioned it also working with the regular "[[Umi (anime Rush Duel)|Umi]]". [[Yujin Goha]] used the [[Dolphin]] series of [[Sea Serpent]] monsters (as well as "[[Levia-Dragon - Daedalus (anime Rush Duel)|Levia-Dragon - Daedalus]]") that utilize "Umi" and/or "Big Umi" as part of their core strategy. [[Oceania Illumilina]]'s [[Thunder]] Deck utilizes "Umi" to power up her monsters, accompanying cards that deal [[burn]] damage. ==Members==Each [[retrained]] counterpart of "[[Umi]]" is thematically (and for some gameplay-wise) associated with another [[WATER]]-based [[archetype]] or [[series]]. {| class="wikitable" style="text-align:center"|-! Card !! Associated Archetype/Series !! Origin|-| [[Umi]]| N/A| N/A|-| [[A Legendary Ocean]]| [[Atlantean]]| [[wikipedia:Atlantis|Atlantis]]|-| [[Lemuria, the Forgotten City]]| [[Mermail]]| [[wikipedia:Lemuria (continent)|Lemuria]]|-| [[Magellanica, the Deep Sea City]]| [[Deep Sea]]| [[wikipedia:Terra Australis|Magellanica (Terra Australis)]]|-| [[Pacifis, the Phantasm City]]| [[Phantasm Spiral]]| [[wikipedia:Pacific Ocean|Pacific Ocean]] / [[wikipedia:Phantom island|Phantom island]]|} ===Support (OCG/TCG)===Several card [[archetype]]s and [[series]] contain multiple cards that directly support "Umi". These include: * [[Daedalus]]* "[[Sea Stealth]]"* "[[Kairyu-Shin (archetype)|Kairyu-Shin]]"* "[[Phantasm Spiral]]"* [[Bugroth]] ====Mako Tsunami Related==== The monsters used by [[Mako Tsunami]] in the ''[[Yu-Gi-Oh! (anime)|Yu-Gi-Oh!]]'' anime, as well as their retrained forms, form an informal series of "Umi"-related cards. Their members are usually directly supported by "[[Umi]]". Mako Tsunami is also thematically associated with the "[[Sea Stealth]]" [[Spell]]/[[Trap]]s, the "[[Kairyu-Shin (archetype)|Kairyu-Shin]]" Spell/Traps (through the monster), and "[[Fish Sonar]]". ; Duelist Kingdom {| class="wikitable" style="text-align:center"|-! Monster !! [[Retrained]]|-| [[Fiend Kraken]]| [[Doom Kraken]]|-| [[Great White Terror]]| N/A|-| [[Jellyfish]]| [[Electric Jellyfish]]|-| [[Kairyu-Shin]]| [[Ocean Dragon Lord - Kairyu-Shin]]|-|} ; Battle City {| class="wikitable" style="text-align:center"|-! Monster !! Retrain 1 !! Retrain 2|-| [[The Legendary Fisherman]]| [[The Legendary Fisherman II]]| [[The Legendary Fisherman III]]|-| [[Fortress Whale]]| [[Citadel Whale]]| [[Mega Fortress Whale]]|-|} ===Support (Rush Duel)===Early in Rush Duel, the only two "Umi"-supporting cards released referenced Skipjack's deck, and helps his strategy in assembling low-ATK Fish monsters for "[[Hydro Cannon Big Bluefin]]"'s effect while using "[[Big Umi]]" to keep the opponent's monsters' power level in check. These cards are "[[Anchor Moray]]", which helps recovering low-Level Fish Normal Monsters, and "[[Aqua Boost]]", which is a Type-based ATK-boosting Spell for Fish monsters in general. The release of ''[[Deck Mod Pack: Chaotic Omega Rising!!]]'' brought a full set of support for "Umi"-related strategies in the form of Yujin's cards and some original support cards that work under both "Umi" and "Big Umi", including a proper boss monster that work in any variations of the deck in "[[Headbutt Cachalot]]", and a powerful battle Trap in "[[Dolphin Counterattack]]". ==Playing style=====OCG/TCG===An "[[Umi]]"-focused [[Deck]] is centered on using the Umi [[Field Spell]]s and the Umi related cards to make plays. The different Umi Field Spells each have different effects, and [[support]] different strategies. Typically however, Umi decks revolve around "[[A Legendary Ocean]]", who reduces the [[Level]] of all [[WATER]] monsters in both players' [[hand]]s and on the [[field]] by 1, allowing Level 5 WATER monsters to be [[Normal Summon]]ed without [[Tribute]]s, and is also searchable by "[[Warrior of Atlantis]]". The support for monsters that support "Umi" specify monsters that "lists "Umi" in its/their text". Additionally, the Spell/Traps associated with [[Mako Tsunami]] introduced in ''[[Duelist Pack: Duelists of the Abyss]]'' (i.e. "[[Sea Stealth II]]", "[[Kairyu-Shin's Dark Reef]]", and "[[Fish Sonar]]") all support [[WATER]] [[Normal Monster]]s in addition to "Umi"-supporting monsters, as the original series of Mako Tsunami's monsters are all WATER Normal Monsters.

== Playing style ===== A Legendary Ocean Deck (historical)====Numerous water decks rely Historical "Umi" Decks were simple control/beatdown Decks, focusing on the Field Spell Card using "[[A Legendary Ocean" with "[[Gravity Bind]]" and "[[Level Limit - Area B]]" to perform powerful effects as discussed belowcreate lockdowns, and Summoning "[[Mermaid Knight]]" and "[[Amphibious Bugroth MK-3]]" to beatdown the opponent.

====Daedalus methodPhantasm Spiral==== One way to use {{Main|Phantasm Spiral}}"[[A Legendary Ocean]]Phantasm Spiral" is with the Decks are focused on using "[[Levia-Dragon - Daedalus]]" or its superiorPacifis, the "[[Ocean Dragon Lord - Neo-DaedalusPhantasm City]]". Both monsters' effects require with its supporting "[[UmiPhantasm Spiral]]" to be on the field (which "A Legendary Ocean" is treated Spell/Traps, as well as). As a result, the entire field is destroyed except the "Daedalus", leaving the user a clear field to perform direct attacks on the opponent. If "[[Abyssal KingsharkSea Stealth Attack]]" is on the field when you activate the effect of "Daedalus", the "Kingshark" is not destroyed. Normally, people would prefer "A Legendary Ocean" for this operation in contrast to "Umi", because Summoning "[[Levia-Dragon - Daedalus]]" would only require one [[Tribute]]. Others prefer to use outgrind the card "[[Big Wave Small Wave]]" to Summon "Daedalus", which is a smart addition to WATER Decks using these tactics. Another good idea is using "[[Warrior of Atlantis]]" to search out "A Legendary Ocean"opponent.

====Decrease Level method 1Legendary Fisherman==== Another way to use "Legendary Fisherman" Decks are focused on turboing out "[[A The Legendary OceanFisherman III]]" , which is to utilize its Level decreasing effect a board wipe on WATER monsters on the field Summon, has extremely high protection, and in the hand. Strong Level 5 WATER monsters such as "can also deal large amounts of [[Giga Gagagigobattle damage]]. It can be Summoned by using ", A Legendary Ocean"[[Terrorking Salmon]]", or to Normal Summon "[[Catapult TurtleThe Legendary Fisherman II]]" can then be Normal Summoned without [[Tribute]]s, allowing the user a more efficient way of bringing out monsters then tributing that monster to inflict heavy damageSpecial Summon "The Legendary Fisherman III".

====Decrease Level method 2Ocean Dragon Lord - Kairyu-Shin i.e. "Umi control"==== Another variation of this method utilizes stall cards such as "A modernized Umi Deck introduced in ''[[Gravity BindDuelist Pack: Duelists of the Abyss]]" or "[[Level Limit - Area B]]" to halt monsters above Level 4. Since the user's WATER monsters (preferably monsters originally Level 4) are decreased in Level', then those monsters would be able to escape the stall cards. This allows this Deck is a control deck with a focus on using "[[Mermaid KnightA Legendary Ocean]]" or to Normal Summon "[[Amphibious Bugroth MKOcean Dragon Lord -3Kairyu-Shin]]" , which has a potent floodgate effect and can search out additional Umi-related cards to either attack twice or attack directly. In further strengthen the case of "Bugroth", "[[Limiter Removal]]" can prove usefulplayer's board. The deck also features various interruptions by using "[[Field BarrierElectric Jellyfish]]" will help in protecting and "[[A Legendary OceanDoom Kraken]]". Spell/Trap negation and/or removal will be handy as wella disruption, including while also dodging opponent's removal via a combination of "[[Dust TornadoSea Stealth Attack]]", "[[Twin Twisters]]"/"[[Mystical Space Typhoon]]", or and "[[Solemn JudgmentSea Stealth II]]".

{{Decklist|Recommended Cards|monsters =<!--This is not an exact Decklist. Please do not add multiples or staples.-->*[[Abyss Soldier]]*[[Abyssal Kingshark]]*[[Amphibious Bugroth MK-3]]*[[Atlantean Dragoons]]*[[Armed Sea Hunter]]*[[Giga Gagagigo]]*[[The Legendary Fisherman]]*[[The Legendary Fisherman III]]*[[Codarus]]*[[Cranium Fish]]*[[Levia-Dragon - Daedalus]]*[[Mermaid Knight]]*[[Deep Diver]]*[[Mother Grizzly]]*[[Nightmare Penguin]]*[[Ocean Dragon Lord - Neo-Daedalus]]*[[Spined Gillman]]*[[Numen erat Testudo]]*[[Warrior of Atlantis]]|synchro monsters =*[[Sea Dragon Lord Gishilnodon]]|xyz monsters =*[[Bahamut Shark]]*[[Number 30: Acid Golem of Destruction]]*[[Number 17: Leviathan Dragon]]*[[Submersible Carrier Aero Shark]]|spells =<!--This is not an exact Decklist. Please do not add multiples or staples.-->*[[A Legendary Ocean]]*[[Big Wave Small Wave]]*[[Aqua Jet]]*[[Twin Twisters]]cards (OCG/[[Mystical Space Typhoon]]*[[Salvage]]*[[Field Barrier]]*[[Terraforming]]|traps =TCG)

|normal monsters = * [[Megalosmasher X]]* [[Giga Gagagigo]]* [[Terrorking Salmon]]|effect monsters = * [[Amphibious Bugroth MK-11]]* [[Citadel Whale]]* [[Codarus]]* [[Doom Kraken]]* [[Electric Jellyfish]]* [[Ocean Dragon Lord - Kairyu-Shin]]*[[Spiritual Water Art Levia-Dragon - Daedalus]]* [[Ocean Dragon Lord - Neo- AoiDaedalus]]* [[Maiden of the Aqua]]* [[Mega Fortress Whale]]* [[The Legendary Fisherman]]* [[The Legendary Fisherman II]]* [[The Legendary Fisherman III]]* [[Yorishiro of the Aqua]]* [[Warrior of Atlantis]]* [[Neptabyss, the Atlantean Prince]]* [[Atlantean Dragoons]]* [[Atlantean Heavy Infantry]]* [[Atlantean Marksman]]*[[Level Limit Buzzsaw Shark]] & [[Lantern Shark]] or [[Right- Area BHand Shark]]*[[Tornado WallCartorhyn the Hidden Gem of the Seafront]]*[[Torrential TributeCrystal Girl]]*[[Gozen MatchGameciel, the Sea Turtle Kaiju]]*[[Forgotten Temple General Raiho of the Ice Barrier]]* [[Infernalqueen Salmon]]* [[Icejade Creation Kingfisher]]* [[Icejade Tremora]]* [[Ice Knight]]* [[Superancient Deepsea King Coelacanth]]* [[Tenyi Spirit - Shthana]]* [[True King Bahrastos, the Fathomer]]|tuner monsters = * [[DeepSea Diva]]* [[Fishborg Harpooner]]* [[Fishborg Launcher]]* [[Icejade Ran Aegirine]]|synchro monsters = * [[Adamancipator Risen - Dragite]]* [[Icejade Gymir Aegirine]]* [[Lancea, Dragonic Ancestor of the Ice Spirit Mountain]]** [[Trishula, Dragon of the Ice Barrier]]* [[Swordsoul Supreme Sovereign - Chengying]]* [[White Aura Whale]]|xyz monsters = * [[Abyss Dweller]]* [[Bahamut Shark]]** [[Toadally Awesome]]** [[Tri-Edge Levia]]* [[Mermail Abyssgaios]]* [[Number 4: Stealth Kragen]]** [[Stealth Kragen Spawn]]|link monsters = * [[Abyss Keeper]]* [[Eria the Water Charmer, Gentle]]* [[Mermail Abyssalacia]]* [[Mistar Boy]]* [[Marincess Coral Anemone]]* [[Worldsea Dragon Zealantis]]|normal spells = * [[Fish Sonar]]* [[Fury of Kairyu-Shin]]* [[Feast of the Wild LV5]]* [[Foolish Burial Goods]] ''(with "Ice Barrier")''* [[Icejade Cradle]]* [[Moray of Greed]]* [[Salvage]]* [[Surface]]* [[Terraforming]]|field spells = * [[A Legendary Ocean]]* [[Lemuria, the Forgotten City]]* [[Pseudo Space]]|continuous spells = *[[Gravity BindSea Stealth II]]*[[Dragonoid Generator]] ''(with "Ocean Dragon Lord - Kairyu-Shin")''|quick-play spells = * [[Rage of Kairyu-Shin]]|normal traps = * [[Abyss-strom]]* [[Kairyu-Shin's Dark BribeReef]]* [[Torrential Tribute]]*[[Trap StunMetaverse]]* [[Ice Barrier (card)|Ice Barrier]]* [[The Ice-Bound God]]* [[White Howling]]|continuous traps = * [[Sea Stealth Attack]]* [[Gozen Match]]

"A Legendary Ocean" Decks ===Rush Duel===Generally speaking, most Fish, Sea Serpent, Thunder and Aqua monsters benefit from the Field Spell to some extent can also utilize [[Synchro Monster]]s. However, certain series' strategies are specifically geared toward using "[[Deep Sea Diva]]Umi" is a [[Tuner monster]], and when [[Normal Summon]]ed it /or "Big Umi". ''Deck Mod Pack: Chaotic Omega Rising!!'' also introduced semi-generic cards that can bring out a Level 3 [[Sea Serpent]]-[[Type]] monster from your [[Deck]]be used with the theme, such as "[[Atlantean PikemanLight Dolphin]]", and "[[Mermaid ArcherKataomoiruka]]"for draw power, or "[[Spined GillmanSea Star Trooper]]"for Graveyard disruption. This can allow a Level 4 or 5 Synchro Monster to be Summoned easily Historically, although with the first strategy that explicitly incorporated "Big Umi" in Rush Duel was Big Bluefin Beatdown. "A Legendary OceanBig Umi" it will instead allow weakens the Summoning of loweropponent's non-Level Synchro Monsters. AdditionallyWATER monsters, while the player bombards them with direct attacks from Fish monsters with 1000 or less ATK, such as "[[Deep Sea DivaHeat Dartfish]]" has less than 1500 or "[[ATKShaman Octopus]]", so it using the effect of "Hydro Cannon Big Bluefin". "Anchor Moray" can be added back used to your recover "Dartfish" or "[[handJet Barracuda]] by "[[Salvage]]or be used as part of the offensive, while reactive Traps (such as the later-released "Dolphin Counterattack") can be used to protect "Big Bluefin"during the opponent's turn.

Later supports give the theme better power cards such as "A Legendary OceanDolphin Counterattack" Decks to some extent can also utilize [[Xyz Monster]]s. Due to and "A Legendary OceanHeadbutt Cachalot" lowering , as well as the Levels of WATER monsters, it is easy to Summon [[Rank]] 3 or lower Xyz Monsters, particularly WATER Xyz Monsters. Also, using original Level 5 WATER monsters whose Levels are lowered by imported "[[A Legendary OceanLevia-Dragon - Daedalus (Rush Duel)|Levia-Dragon - Daedalus]]", such as "[[Giga Gagagigo]]" or "[[Terrorking Salmon]]", allows a powerful choice for the player to Summon Rank 4 Xyz Monsters, such as "deck's [[Bahamut SharkLegend Card]]" which can use its effect to Summon strong Rank 3 or lower WATER Xyz Monsters.

{{Decklist|Recommended cards (Rush Duel)<!--This is not an exact Decklist. Please do not add multiples or staples.-->|normal monsters =*[[Dolphin King Iruqua]]*[[Heat Dartfish]] ''(with "Hydro Cannon Big Bluefin")''*[[Jet Barracuda]] ''(with "Hydro Cannon Big Bluefin")''*[[Takriminos (Rush Duel)|Takriminos]]*[[Anglercoilfish]]*[[Pluggyfish]] ''(with "Fusion")''*[[Surge Bolt Lizard]]*[[Unidentified Mysterious Urchin]] ''(with "Salvage Wolfish")''*[[Water Magician (Rush Duel)|Water Magician]]|effect monsters =Weaknesses*[[Abyss Soldier (Rush Duel)|Abyss Soldier]] [[File:Legend Icon.png|x12px|link=Legend Card]]*[[Anchor Moray]]*[[Headbutt Cachalot]]*[[Light Dolphin]]*[[Kataomoiruka]]*[[Hydro Cannon Big Bluefin]]*[[Levia-Dragon - Daedalus (Rush Duel)|Levia-Dragon - Daedalus]] [[File:Legend Icon.png|x12px|link= Legend Card]]One weakness of this Deck is that in order for monsters to reach their full potential, they must have *[[Salvage Wolfish]]*[[A Legendary OceanSea Dragon Cranedross]] ''(with "Sea Dragon King Granganus" and/or "Grand Extreme")''*[[Sea Dragon King Granganus]]*[[Sea Dragon Knight]]*[[Shaman Octopus]]*[[Sea Star Trooper]]*[[Survival Swordfish]]*[[Swordfish Vanguard Gaju]]*[[Thunder Cavalry Triggerdrago]]*[[UmiHandsray Destleo]]*[[Sensor Duckbill]] ''(if running a high-Level Thunder monster(s))''*[[Stormbolt Destroyer]]*[[The Creator (Rush Duel)|The Creator]] [[File:Legend Icon.png|x12px|link=Legend Card]]*[[Thunder Gazelle]] on *[[Thunderbold, the field. This is easily remedied Blazing Thunder]]*[[Zap Zap Octospark]] ''(with cards such as "Fusion")''|fusion monsters = *[[Poseigyon Advencharger]]*[[Showering Seaferno]]*[[Surge Vortex Dragoon]]|normal spells = *[[Aqua Boost]]*[[Dolphin's Treasure Chest]]*[[Fusion (Rush Duel)|Fusion]]*[[Grand Extreme]]*[[Warrior Shape of AtlantisAqua]]. Another great weakness *[[Ship of this deck is Seven Treasures]]*[[Star Restart]] ''(with "Fusion")''*[[Strange Seas]]*[[TualatinTrailblitzing Thunderblast]], as it can stop you from ''(if running multiple Thunder monsters)''*[[SummoningVanishing Torrent]] any ''(if running multiple Sea Serpent monsters. Adding cards such as )''|field spells = *[[Umi (Rush Duel)|Umi]]*[[Big Umi]]|normal traps = *[[Bait Bite Ball]]*[[Dolphin Counterattack]]*[[Horn Seastorm of HeavenIruqua]] and *[[Bottomless Trap HoleElectrical Discharge]] can help you overcome these hazards.''(with "Surge Vortex Dragoon")''}}