Cancer Deck Breakdown

WATER 4

If "Umi" is on the field (Quick Effect): You can target 1 WATER monster you control, except "Doom Kraken", and 1 monster your opponent controls; Special Summon this card from your hand, and if you do, return that monster you control to the hand, and if you do that, destroy that opponent's monster. When an opponent's monster declares an attack: You can return this card to the hand, and if you do, negate that attack. You can only use each effect of "Doom Kraken" 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 2

During either player's turn: You can send this card from your hand to the Graveyard; this turn, each time your opponent Special Summons a monster(s), immediately draw 1 card. You can only use 1 "Maxx "C"" per turn.

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.

WATER 5

This card's name becomes "The Legendary Fisherman" while on the field or in the GY. While "Umi" is on the field, this card is unaffected by other monsters' effects. If this face-up card is destroyed by battle, or leaves the field because of an opponent's card effect while its owner controls it: You can add 1 Level 7 WATER monster from your Deck to your hand.

WATER 7

Cannot be Normal Summoned/Set. Must be Special Summoned (from your hand) by Tributing 1 "The Legendary Fisherman". When this card is Special Summoned: You can banish all monsters your opponent controls, also this card cannot attack this turn. Cannot be destroyed by battle or card effects, also unaffected by Spell/Trap effects. Once per turn: You can return as many of your opponent's banished cards as possible to their GY, and if you do, the first battle or effect damage your opponent takes this turn becomes doubled.

FIRE 3

When a card or effect is activated that includes any of these effects (Quick Effect): You can discard this card; negate that effect. ● Add a card from the Deck to the hand. ● Special Summon from the Deck. ● Send a card from the Deck to the GY. You can only use this effect of "Ash Blossom & Joyous Spring" once per turn.

Spell Field

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

Spell Quick

Target 1 monster in your opponent's GY; banish it, and if you do, until the end of the next turn, its effects are negated, as well as the activated effects and effects on the field of monsters with the same original name.

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 Normal

Add 1 "Torrential Tribute" from your Deck to your hand. If a WATER monster(s) you control would be destroyed by card effect, you can banish this card from your GY instead. You can only use each effect of "Fury of Kairyu-Shin" once per turn.

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

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 Normal

If your opponent controls a card, you can activate this card from your hand. When a card or effect is activated that includes an effect that Special Summons a monster(s): Negate that effect, then if you have a Trap in your GY, destroy that card. If you activated this card from your hand, you cannot activate the effects of LIGHT, EARTH, and WIND monsters for the rest of this Duel. You can only activate 1 "Dominus Impulse" per turn.

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 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 Normal

When a monster(s) is Summoned: Destroy all monsters on the field.

LIGHT 4

Cannot be destroyed by battle with a monster Special Summoned from the Extra Deck. You can only use each of the following effects of "Dogmatika Ecclesia, the Virtuous" once per turn. If a monster Special Summoned from the Extra Deck is on the field: You can Special Summon this card from your hand. If this card is Normal or Special Summoned: You can activate this effect; add 1 "Dogmatika" card from your Deck to your hand, except "Dogmatika Ecclesia, the Virtuous", also you cannot Special Summon monsters from the Extra Deck for the rest of this turn.

EARTH 4

If this card is flipped face-up: Destroy all Special Summoned monsters on the field. Neither player can Special Summon monsters.

LIGHT 10

Cannot be Normal Summoned/Set. Must be Special Summoned (from your hand) by sending 3 face-up Continuous Spell Cards you control to the Graveyard, and cannot be Special Summoned by other ways. If this card destroys an opponent's monster by battle and sends it to the Graveyard: Inflict 1000 damage to your opponent. While this card is in face-up Defense Position, monsters your opponent controls cannot target monsters for attacks, except this one.

LIGHT 4

Cannot be Normal or Special Summoned if you control a monster. Neither player can activate monster effects unless the number of monster effects that player has previously activated that turn is less than the number of monster card types currently on the field (Ritual, Fusion, Synchro, Xyz, Pendulum, and Link). (If an effect's activation was negated, it still counts toward the total for that turn. Only count effects that were activated while this monster was face-up on the field.)

Spell Continuous

All face-up monsters on the field become Machine monsters. Machine monsters you control gain 500 ATK/DEF, also Machine monsters your opponent controls lose 500 ATK/DEF. You can banish this card from your GY, then discard 1 card; add 1 EARTH Machine monster from your Deck to your hand. You can only use this effect of "Clockwork Night" once per turn. You can only activate 1 "Clockwork Night" per turn.

Spell Normal

Send 1 monster from your Extra Deck to the GY, then add 1 "Dogmatika" monster or "Fallen of Albaz" from your Deck or GY to your hand, that has ATK less than or equal to that sent monster in the GY, also, for the rest of this turn after this card resolves, you cannot Special Summon monsters from the Extra Deck. You can only activate 1 "Nadir Servant" per turn.

Spell Field

All "Gravekeeper's" monsters gain 500 ATK and DEF. Cards in the Graveyard cannot be banished. Negate any card effect that would move a card in the Graveyard to a different place. Negate any card effect that changes Types or Attributes in the Graveyard.

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 Normal

For the rest of this Duel, apply the following effects. ● You cannot activate monster effects in the hand. ● Monsters you control can make up to 2 attacks on monsters during each Battle Phase. ● If your monster battles an opponent's monster, any battle damage it inflicts to your opponent is doubled. You can banish this card from your GY; add 1 "Morganite" card from your Deck to your hand, then place 1 card from your hand on the bottom of the Deck.

Spell Quick

Discard 1 card; Fusion Summon 1 Fusion Monster from your Extra Deck, using monsters from either field as Fusion Material. Neither player can activate cards or effects in response to this card's activation.

Spell Normal

For the rest of this Duel, apply the following effects. ● You cannot activate monster effects in the hand. ● Draw 2 cards instead of 1 for your normal draw during your Draw Phase. ● You can conduct 2 Normal Summons/Sets per turn, not just 1. You can banish this card from your GY, then discard 1 "Time-Tearing Morganite"; your opponent cannot activate monster effects when you Normal Summon this turn.

Spell Normal

If your opponent has activated a monster effect during your Main Phase this turn: Activate 1 of these effects; ● Draw 2 cards. ● Take control of 1 monster your opponent controls until the End Phase. ● Look at your opponent's hand, and choose 1 card from it to shuffle into the Deck. You can only activate 1 "Triple Tactics Talent" per turn.

Spell Normal

If your opponent has activated a monster effect during this turn: Set 1 Normal Spell/Trap directly from your Deck, except "Triple Tactics Thrust", or if your opponent controls a monster, you can add it to your hand instead. That Set card cannot be activated this turn. You can only activate 1 "Triple Tactics Thrust" per turn.

Trap Continuous

Both players must Set Spell Cards before activating them, and cannot activate them until their next turn after Setting them.

Trap Continuous

Activate by targeting 1 face-up monster your opponent controls; take control of that monster. While you control that monster, it cannot attack or activate effects. When that monster leaves the field, destroy this card.

Trap Normal

Target 1 face-up monster your opponent controls; send 1 monster with an equal or higher ATK from your Extra Deck to the GY, and if you do, destroy that monster. Until the end of your next turn after this card resolves, you cannot Special Summon monsters from the Extra Deck. You can only activate 1 "Dogmatika Punishment" per turn.

Trap Continuous

Each player can only control 1 Attribute of monster. Send all other face-up monsters they control to the GY.