Umi (series)

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  • うみ
  • (base)
  • うみ (ruby)
  • Umi (romanized)
  • 바다
Anime appearances
Manga appearances

Umi (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 Cards 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, 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" with all cards that mentioned it also working with the regular "Umi". Yujin Goha used dolphin-based Sea Serpent monsters (as well as "Levia-Dragon - Daedalus") that utilize "Umi" and/or "Big Umi" as part of their core strategy. Flash Umiko's Thunder Deck utilizes "Umi" to power up her monsters, accompanying cards that deal burn damage.


Each retrained counterpart of "Umi" is thematically (and for some gameplay-wise) associated with another WATER-based archetype or series.

Card Associated Archetype/Series Origin
Umi N/A N/A
A Legendary Ocean Atlantean Atlantis
Lemuria, the Forgotten City Mermail Lemuria
Magellanica, the Deep Sea City Deep Sea Magellanica (Terra Australis)
Pacifis, the Phantasm City Phantasm Spiral Pacific Ocean / Phantom island

Support (OCG/TCG)[edit]

Several card archetypes and series contain multiple cards that directly support "Umi". These include:

Mako Tsunami Related[edit]

The monsters used by Mako Tsunami in the 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".

Additionally, Mako Tsunami is also thematically associated with the "Sea Stealth" Spell/Traps, the "Kairyu-Shin" Spell/Traps (through the monster), and "Fish Sonar".

Duelist Kingdom
Monster Retrained
Fiend Kraken Doom Kraken
Great White Terror N/A
Jellyfish Electric Jellyfish
Kairyu-Shin Ocean Dragon Lord - Kairyu-Shin
Battle City
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)[edit]

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 Modification 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 Counter".

Playing style[edit]


An "Umi"-focused Deck is centered on using the Umi Field Spells 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' hands and on the field by 1, allowing Level 5 WATER monsters to be Normal Summoned without Tributes, 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 Monsters in addition to "Umi"-supporting monsters, as the original series of Mako Tsunami's monsters are all WATER Normal Monsters.

A Legendary Ocean (historical)[edit]

Historical "Umi" Decks were simple control/beatdown Decks, focusing on using "A Legendary Ocean" with "Gravity Bind" and "Level Limit - Area B" to create lockdowns, and Summoning "Mermaid Knight" and "Amphibious Bugroth MK-3" to beatdown the opponent.

Phantasm Spiral[edit]

"Phantasm Spiral" Decks are focused on using "Pacifis, the Phantasm City" with its supporting "Phantasm Spiral" Spell/Traps, as well as "Sea Stealth Attack", to outgrind the opponent.

Legendary Fisherman[edit]

"Legendary Fisherman" Decks are focused on turboing out "The Legendary Fisherman III", which is a board wipe on Summon, has extremely high protection, and can also deal large amounts of battle damage. It can be Summoned by using "A Legendary Ocean" to Normal Summon "The Legendary Fisherman II" without Tributes, then tributing that monster to Special Summon "The Legendary Fisherman III".

Ocean Dragon Lord - Kairyu-Shin[edit]

A modernized Umi Deck introduced in Duelist Pack: Duelists of the Abyss, this Deck is focused on using "A Legendary Ocean" to Normal Summon "Ocean Dragon Lord - Kairyu-Shin", who has a potent floodgate effect and can search out additional Umi-related cards to further strengthen the player's board.

Rush Duel[edit]

Generally speaking, most Fish, Sea Serpent, Thunder and Aqua monsters benefit from the Field Spell to some extent. However, certain series' strategies are specifically geared toward using "Umi" and/or "Big Umi". Deck Modification Pack - Chaotic Omega Rising!! also introduced semi-generic cards that can be used with the theme, such as "Karuiruka" and "Kataomoiruka" for draw power, or "Sea Star Trooper" for Graveyard disruption.

Historically, the first strategy that explicitly incorporated "Big Umi" in Rush Duel was Big Bluefin Beatdown. "Big Umi" weakens the opponent's non-WATER monsters, while the player bombards them with direct attacks from Fish monsters with 1000 or less ATK, such as "Heat Dartfish" or "Shaman Octopus", using the effect of "Hydro Cannon Big Bluefin". "Anchor Moray" can be used to recover "Dartfish" or "Jet Barracuda" or be used as part of the offensive, while reactive Traps (such as the later-released "Dolphin Counter") can be used to protect "Big Bluefin" during the opponent's turn.

Later supports give the theme better power cards such as "Dolphin Counter" and "Headbutt Cachalot", as well as the imported "Levia-Dragon - Daedalus" as a powerful choice for the deck's Legend Card.