Umi Deck Breakdown

DARK 7

When your opponent Special Summons a monster (except during the Damage Step): You can discard 1 card; Special Summon this card from your hand. Your opponent cannot banish cards.

DARK 6

If you have no cards in your GY (Quick Effect): You can send this card from your hand to the GY; until the end of the next turn, any card sent to the GY is banished instead.

EARTH 7

If your opponent controls more monsters than you do, you can Special Summon this card (from your hand). You can only Special Summon "Dinowrestler Pankratops" once per turn this way. (Quick Effect): You can Tribute 1 "Dinowrestler" monster, then target 1 card your opponent controls; destroy it. You can only use this effect of "Dinowrestler Pankratops" once per turn.

WATER 4

You can send 1 "Umi" from your hand, Deck, or face-up field to the GY; Special Summon 1 WATER monster from your hand. When your opponent activates a monster effect, or Spell Card or effect, while "Umi" is on the field (Quick Effect): You can negate that effect, then, you can make this card gain 600 ATK/DEF. You can only use each effect of "Electric Jellyfish" once per turn.

EARTH 7

If you control no monsters, you can Special Summon this card (from your hand). You can only use each of the following effects of "Kashtira Fenrir" once per turn. During your Main Phase: You can add 1 "Kashtira" monster from your Deck to your hand. When this card declares an attack, or if your opponent activates a monster effect (except during the Damage Step): You can target 1 face-up card your opponent controls; banish it, face-down.

WATER 7

If you control no monsters, you can Special Summon this card (from your hand). You can only use each of the following effects of "Kashtira Ogre" once per turn. During your Main Phase: You can add 1 "Kashtira" Trap from your Deck to your hand. When this card declares an attack, or if your opponent activates a monster effect (except during the Damage Step): You can excavate up to 5 cards from the top of your opponent's Deck, banish 1 excavated card, face-down, and place the rest on the top of the Deck in the same order.

WIND 7

If you control no monsters, you can Special Summon this card (from your hand). You can only use each of the following effects of "Kashtira Unicorn" once per turn. During your Main Phase: You can add 1 "Kashtira" Spell from your Deck to your hand. When this card declares an attack, or if your opponent activates a monster effect (except during the Damage Step): You can look at your opponent's Extra Deck, and if you do, banish 1 monster from it, face-down.

WATER 4

As long as this card remains face-up on the field, the field is treated as "Umi" (however there is no increasing or decreasing of ATK/DEF due to "Umi"'s effect). If there is an active Field Spell Card on the field, this effect is not applied.

LIGHT 8

To Tribute Summon this card face-up, you can Tribute Continuous Spell/Trap Card(s) you control, as well as monsters. Unaffected by the effects of cards with the same card type (Monster, Spell, and/or Trap) as the original card type of the cards Tributed for its Tribute Summon. Once per turn, during either player's turn, if you control this Tribute Summoned monster: You can banish 1 Continuous Spell/Trap Card from your Graveyard, then target 1 other card on the field; destroy it.

WATER 7

If "Umi" is on the field: You can activate this effect; your WATER monsters can attack directly this turn. During your opponent's Battle Phase (Quick Effect): You can target 1 face-up monster your opponent controls; destroy it. If this card on the field is destroyed by battle or card effect: You can either add to your hand or Special Summon 1 WATER Warrior monster from your Deck or GY. You can only use each effect of "Mega Fortress Whale" once per turn.

WATER 5

While "Umi" is on the field, each player can only control 1 face-up non-WATER monster. (If a player controls 2 or more, they must send some to the GY so they only control 1.) During your Main Phase: You can add from your Deck to your hand 1 "Umi", 1 "Kairyu-Shin" Spell/Trap, or 1 "Sea Stealth" Spell/Trap. You can only use this effect of "Ocean Dragon Lord - Kairyu-Shin" once per turn.

DIVINE 10

Cannot be Special Summoned. Requires 3 Tributes from either side of the field to Normal Summon to that side of the field (cannot be Normal Set), then shift control to this card's owner during the End Phase of the next turn. Cannot attack. Your opponent cannot target this card for attacks or by card effects. You can Tribute this card; Special Summon 1 "The Winged Dragon of Ra" from your hand or Deck, ignoring its Summoning conditions, and if you do, its ATK/DEF become 4000.

Spell Normal

Add 1 Level 7 or lower monster from your Deck to your hand, that mentions "Umi", or is a WATER Normal Monster, then if "Umi" is on the field, you can Special Summon 1 WATER Normal Monster from your Deck. You can only activate 1 "Fish Sonar" per turn.

Spell Normal

Send 1 Spell/Trap from your Deck to the GY. You can only activate 1 "Foolish Burial Goods" per turn.

Spell Quick

Target 1 face-up monster on the field; until the end of this turn, that target loses 800 ATK, but is unaffected by the effects of other Spells/Traps.

Spell Continuous

You can Normal Summon Level 7 monsters without Tributing. During your Main Phase: You can Special Summon 1 of your non-Xyz "Kashtira" monsters that is banished or in your GY. If your opponent activates a Spell Card or effect, and you control a "Kashtira" monster: You can target 3 cards in your opponent's GY; banish them, face-down. You can only use each effect of "Kashtira Birth" once per turn.

Spell Normal

Target 1 "Kashtira" monster you control; Special Summon 1 "Kashtira" monster with a different Attribute from your Deck in Defense Position, also for the rest of this turn after this card resolves, you cannot Special Summon monsters from the Extra Deck, except Xyz Monsters. If this card is banished: You can target 1 of your banished "Kashtira" cards, except "Kashtiratheosis"; add it to your hand. You can only use each effect of "Kashtiratheosis" once per turn.

Spell Field

(This card's name is always treated as "Umi".) You cannot Normal or Special Summon Effect Monsters the turn you activate either of this card's effects (even if this card leaves the field). Once per turn, if you Normal or Special Summon exactly 1 Normal Monster (and no other cards): Add 1 "Phantasm Spiral" card from your Deck to your hand. If your opponent activates a card or effect (except during the Damage Step), and you control no Tokens: You can Special Summon 1 "Phantasm Spiral Token" (Wyrm-Type/WATER/Level 8/ATK 2000/DEF 2000).

Spell Normal

At the start of your Main Phase 1: Banish 3 or 6 random face-down cards from your Extra Deck, face-down; draw 1 card for every 3 cards banished. For the rest of this turn after this card resolves, you cannot draw any cards by card effects.

Spell Normal

Banish 3 or 6 cards of your choice from your Extra Deck, face-down; for the rest of this turn after this card resolves, any damage your opponent takes is halved, also excavate cards from the top of your Deck equal to the number of cards banished, add 1 excavated card to your hand, place the rest on the bottom of your Deck in any order. You can only activate 1 "Pot of Prosperity" per turn. You cannot draw cards by card effects the turn you activate this card.

Spell Continuous

Activate by declaring 1 card name. Cards with that name, and their effects, cannot be used. Cards already on the field are not affected (including face-down cards).

Spell Continuous

This card's name becomes "Umi" while on the field or in the GY. Your opponent cannot target WATER monsters you control with non-WATER monster effects. At the start of the Battle Phase: You can Special Summon from your hand or GY, 1 monster that mentions "Umi", or 1 WATER Normal Monster, in Defense Position, but destroy it at the end of the Battle Phase. You can only use this effect of "Sea Stealth II" once per turn.

Trap Counter

When your opponent activates a Spell/Trap Card: Your opponent draws 1 card, also negate the Spell/Trap activation, and if you do, destroy it.

Trap Normal

At the end of the Battle Phase, if your opponent controls more cards than you do: You can make your opponent banish cards from their field face-down so they control the same number of cards as you do. If you control no cards, you can activate this card from your hand.

Trap Normal

When an attack is declared involving your opponent's monster: Change that opponent's monster's ATK to 0, negate its effects, also it cannot change its battle position. You can banish this card from your GY; send 1 Level 5 or higher WATER monster from your Deck to the GY, then, you can add 1 WATER monster from your GY to your hand, also, until the end of your next turn after this effect resolves, you cannot Special Summon monsters, except WATER monsters. You can only use this effect of "Ice Barrier" once per turn.

Trap Normal

Send 1 face-up "Umi" you control to the GY; Special Summon up to 2 monsters with different names from your hand and/or Deck, that mention "Umi" or are WATER Normal Monsters, in Defense Position, then if your opponent controls a monster, you can Special Summon any number of Level 6 or lower WATER Normal Monsters from your hand and/or Deck. Until the end of your next turn after this card resolves, you cannot Special Summon monsters, except WATER monsters. You can only activate 1 "Kairyu-Shin's Dark Reef" per turn.

Trap Normal

Take 1 Field Spell from your Deck, and either activate it or add it to your hand.

Trap Normal

If all monsters you control are Normal Monsters (min. 1): Target 1 card your opponent controls; destroy it. If "Umi" is on the field, you can activate this card from your hand. You can banish this card from your Graveyard, then target 1 Normal Monster you control; equip that Normal Monster with all "Phantasm Spiral" Equip Spell Cards you control that can equip to it.

Trap Normal

If all monsters you control are Normal Monsters (min. 1): Target 1 Effect Monster your opponent controls; until the end of this turn, it loses 1000 ATK and DEF, also it has its effects negated. If "Umi" is on the field, you can activate this card from your hand. You can banish this card from your Graveyard, then target 1 Normal Monster you control; equip 1 "Phantasm Spiral" Equip Spell Card from your hand or Graveyard to that Normal Monster.

Trap Continuous

When this card is activated: You can activate 1 "Umi" from your hand or GY. While "Umi" is on the field, this face-up card gains these effects. ● Once per turn: You can banish 1 WATER monster you control until the End Phase; this turn, face-up Spells/Traps you control cannot be destroyed by your opponent's card effects (even if this card leaves the field). ● At the start of the Damage Step, if your WATER monster whose original Level is 5 or higher battles an opponent's monster: Destroy that opponent's monster.

Trap Continuous

Activate by paying 1000 LP. Negate the effects of all face-up monsters while they are face-up on the field (but their effects can still be activated).

Trap Counter

When a monster(s) would be Special Summoned, OR a monster effect is activated: Pay 1500 LP; negate the Summon or activation, and if you do, destroy that card.

Trap Continuous

Each player can only control 1 monster of each Type. If a player controls 2 or more monsters of the same Type, they must send some to the GY so they control no more than 1 monster of that Type.

Trap Continuous

You can pay 1000 LP, then target 1 face-up Spell/Trap on the field; destroy it. You can only activate this effect of "Unending Nightmare" once per Chain.