A Legendary Ocean | Decks and Tips

This page notes details of A Legendary Ocean (Spell Card/Field) : decks, tips, effect and rulings. Learn and enjoy playing Yu-Gi-Oh! Duel Links!
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update 06/05/2020

A Legendary Ocean

A Legendary Ocean
TypeSpell Card
Card Effect TypeCondition / Continuous-like Effect
SupportsWATER / Umi
Related to ArchetypesField Searcher


This card's name is treated as "Umi". Reduce the Level of all WATER monsters in both players' hands and on the field by 1. All WATER monsters gain 200 ATK and DEF.

How to get / Rarity

Level-up reward--
Victory against--
Card traderTradable [SR]
[Required trader items]
  • SR Jewel x5
  • Stone of Spell x50
  • 40,000 Gold




  • It reduces the Level of monsters in hand which makes Level 5 monsters to be normal summoned without a tribute.
  • It gives 200 attack and defense to monsters.
  • Card effects that has a synergy with Umi also benefits from this card since this card name is treated as Umi.


  • Only WATER monsters can benefit from its effects.
  • Unlike Umi, it doesn't decrease the attack and defense of Machine and Pyro-Type monsters.
  • Your opponent is also affected by its effects which could be bad in a mirror match.
  • Lowering Hammer Shark's level means that you can only activate its ability twice.


Leevl 5/7 Water monsters

While A Legendary Ocean is face-up on the field, higher level Water monsters will be easier to summon. Level 5 monsters like Orca Mega-Fortress of Darkness can be normal summoned without tribute. They already have an attack advantage compared to most level 4 or lower monsters, and their attack is also increased from Legendary Ocean's effect. Levia-Dragon - Daedalus can be tribute summoned using only 1 tribute, making it much easier to use.


You can either bring more Legendary Oceans in the deck, or use card searches like Planet Pathfinder, or An Owl of Luck to search from your deck, ensuring that you get the field spell, which you can potentially get very early in the duel.


WATER decks


  • Level 1 monsters are still level 1 even if A Legendary Ocean field spell is on the field.


Stat changesAll monsters gain ATK / All monsters gain DEF / All monsters lose Levels / Name condition


Hot New Top
Stay tuned for KOG secret Mako deck that will be released soon, I will post it on Reddit and Dkayed Website, a full guide will be posted on duellinks.gamepress
<< Anonymous
Anonymous Reply
legendary ocean isn't a skill so its really bad lol, i srsly want to know how someone can make it to KoG with a worthless (and potentially multiple copies) card in deck
<< Anonymous
Anonymous Reply
It will be a lot better when cards like Gravity Bind exist.
<< Anonymous
Anonymous Reply
why would gravity bind be released anytime soon lol
<< Anonymous
Razaelriezen Reply
Try tornado wall.
Not a lot of anti spell traps cards in deck so if timed right
Alo plus tornado wall equals good game
The card trader rotation e a huge joke, i haven't seen this card a single time yet.
I literally don't think I've even seen this card in the card trader since it was released....
Real quick, has anyone gotten this card from the card trader? Or even seen it in the card trader? I would like to get 3 of the card just for fun (i mostly run water decks) but haven't found this or Uminotauros in the card trader yet. 3 copies of Ocean Dragon Lord thought...
<< Anonymous(Edgar81539)
Anonymous Reply
Probably because it's not very good and they know it
<< Anonymous
sjp91 Reply
Try telling that to some people(hint hint)who apparently think that having s/t destruction in a deck is too much to ask for
If we only got Warrior of Atlantis. It would be better searcher.
<< Anonymous
Anonymous Reply
Warrior of atlantis is a bit OP in the actual meta, don't u think?
<< Anonymous
Anonymous Reply
Giga Gagagigo would be OP as well haha
<< Anonymous
Anonymous Reply
or terraforming
How to nerf 3SD: realease a field spell that does similar but without LP reduction. Heeelp
<< Anonymous
Anonymous Reply
Except you still need to waste deck slots and isn't anywhere near as abusable. Legendary Ocean is a bad card while 3SD is a 🔥ed skill
Finally something that can make water decks top tier again! Can't wait to get this!
<< Anonymous
Anonymous Reply
Water decks have been amazing since Hammer Shark was released like a month or two ago
Potential target for level 5 water monster: Orca Mega Fortress of Darkness, those missile fish might be viable now, the legendary fisherman, combine with mystic box while legendary ocean active=free enemy destroy, catapult turtle, possible sacrifice toss to deal damage
<< Anonymous
Anonymous Reply
Don't use Mako, Paradox bros are much better to use this water deck since Daedalus + 3 Star Demotion + A Legendary Ocean is a good combo.
<< Anonymous
Daemon Blitzkrieg Reply
May I ask what's the point of using 3SD & Legendary Ocean in the same deck? Better yet, 3SD for ANY Water Deck? They have plenty support of their own that can slam faster and harder than 3SD wishes it could. -_-
<< Anonymous(Vhakor)
Realm Reply
Why not just use Mai HHG at this point?
I use Mako because I like Water.
<< Anonymous
Anonymous Reply
F 3sd...
Single tribute Suijin decks anyone?
Any deck list with this card?
I wish it will be a good deck playing pathfinder, double summon, water hazard and orca mega fortress.. obviously with hammer shark core..
What do u think about it?
<< Anonymous(Pie)
Anonymous Reply
That's a great idea. I am working on it too
<< Anonymous
Anonymous Reply
Necrovalley shouldn't be released. It's very very overpowered. It's the best field spell in entire Yu-Gi-Oh! catalogue I think.
<< Anonymous
Realm Reply
Dragon Valley, Divine Wind of Mist Valley and Chicken Game are Yugioh best Field Spells.
<< Anonymous(Realm)
Realm Reply
I mean Dragon Ravine.
<< Anonymous
Anonymous Reply
nope necrovalley not strong, you need use de-spell, twister, wild tornado combo storm, or use deck HHG for remove field spell necrovally.. best field spell card is The Seal of Orichalcos

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