Mokuba | Labyrinth Wall - LV40 Farming Deck

Deck by Aeroxas
Deck Overview
Deck Consistency
Pack Expense
Farm Expense
Card Trader Expense
Deck Skill
Character Skill
Labyrinth Builder
Shuffle 2 cards from your hand into the Deck to create "Labyrinth Wall" on your side of the field. This skill can only be used once per Duel.
Deck Build
1 4 15 1
Monsters: 7
Spells: 8
Traps: 6
Monster Card
Card Rarity Quantity
Des Kangaroo
ATK: 1500 DEF: 1700

If the ATK of a monster that attacks this monster is lower than the DEF of this card, destroy the attacking monster. (Damage calculation is applied normally.)

SR 1
Gravekeeper's Vassal
ATK: 700 DEF: 500

Any battle damage this card inflicts to your opponent is treated as effect damage instead.

R 1
Crystal Seer
ATK: 100 DEF: 100

FLIP: Excavate the top 2 cards of your Deck, add 1 of them to your hand, then place the other on the bottom of your Deck.

R 3
Big Koala
Big Koala
Big Koala
ATK: 2700 DEF: 2000

A species of huge Des Koala. He's meek, but people are afraid of him because he's very powerful.

R 1
Spell Card
Card Rarity Quantity

Fusion Summon 1 Fusion Monster from your Extra Deck, using monsters from your hand or your side of the field as Fusion Materials.

SR 1
Union Attack
Union Attack
Union Attack

Target 1 face-up monster you control; add up the total ATK of all other face-up Attack Position monsters you currently control, then during the Battle Phase of this turn only, the monster gains that much ATK, but cannot inflict battle damage to your opponent, also other face-up Attack Position monsters cannot attack.

SR 2

Destroy as many Spell/Trap Cards you control as possible, then destroy as many Spell/Trap Cards your opponent controls as possible, up to the number of cards destroyed by this effect.

R 3

Increase the ATK and DEF of all Fish, Sea Serpent, Thunder, and Aqua-Type monsters by 200 points. Decrease the ATK and DEF of all Machine and Pyro-Type monsters by 200 points.

R 1
Secret Pass to the Treasures

Select 1 face-up monster with an ATK equal to 1000 points or less on your side of the field. During the turn this card is activated, the selected monster can attack your opponent's Life Points directly.

N 1
Trap Card
Card Rarity Quantity
Good Goblin Housekeeping
Good Goblin Housekeeping
Good Goblin Housekeeping

Draw cards equal to the number of "Good Goblin Housekeeping" cards in your Graveyard +1, then select 1 card from your hand and return it to the bottom of your Deck.

R 3
Trap Jammer

When your opponent activates a Trap Card during the Battle Phase: Negate the activation, and if you do, destroy it.

R 3
Extra Deck
Monster Card
Card Rarity Quantity
Master of Oz
Master of Oz
Master of Oz
ATK: 4200 DEF: 3700

"Big Koala" + "Des Kangaroo"

UR 1
Draw Simulator
Packs to pull to build this deck
Characters to farm to build this deck
Deck Strengths
  • Flexible; can be adjusted to a player's liking
  • Stable and consistent
  • High Score
Deck Weaknesses
  • Includes event-exclusive cards
  • Labyrinth Builder is exclusive to the Paradox Brothers
Deck Summary


This deck guarantees 7700 Duel Assessment points if used correctly. Glossy cards and other bonuses can raise your final score. Stall with Labyrinth Wall and prepare for the final turn combo.


Activate the skill to summon Labyrinth Wall in Defense Position during the first turn.Since Mokuba has no cards that can get past its high DEF, this card is all we need to protect ourselves.

With that taken care of, our only threat left is Negate Attack. For that, we can either destroy it or negate it. We can either use Storm, Straight Flush, or Trap Jammer.

Manage your hand well. Set Spell/Trap cards if you need to, but if you're planning to use Storm to rid of Negate Attack, do NOT set your combo pieces.

Feel free to Fusion Summon Master of Oz early. Like Labyrinth Wall, Mokuba does not have any cards that can get over Master of Oz.

If you're aiming for 8,000 Duel Assessment points, you can gain more by:

  • Destroying Mokuba's monsters by battle with Master of Oz. Avoid doing Battle Damage to him or you will not get the "Victory by Effect Damage Only" bonus.
  • Include and play Glossy/Prismatic cards. You get 100 Duel Assessment points for each Glossy card you play, and 200 for each Prismatic card.
  • Lower your Life Points to 100 to receive the "LP on the Brink" bonus. You will receive 1,000 Duel Assessment Points for this.

Final turn combo:

1) Fusion Summon Master of Oz if you have not already. Make sure it is in Attack Position.

2) Activate Storm or Straight Flush to clear out Bakura's Spell/Trap cards.

3) Equip Lucky Iron Axe to Labyrinth Wall or Master of Oz, then change it into Attack Position.

4) Normal Summon Gravekeeper's Vassal.

5) Activate Secret Pass to the Treasures and your copies of Union Attack, targeting Gravekeeper's Vassal for both effects.

6) Enter the Battle Phase and attack directly with Gravekeeper's Vassal to win the Duel. If Mokuba activates Negate Attack, activate Trap Jammer.

Card Choice Explanation:

Crystal Seer, Good Goblin Housekeeping: Draw power for getting the cards we need and to make up for the two we shuffled back with the skill.

Umi: Storm fodder. With a field spell, we can destroy 3 Spell/Trap cards with Storm instead of 2. You can replace this with any field spell.

Fusion Package (Des Kangaroo, Big Koala, Master of Oz): I use this Fusion package as our main buffer for Gravekeeper's Vassal. With two Union Attack, we need at least 9,300 more ATK if we want to boost Gravekeeper's Vassal's ATK to over 9,999.

Core Cards
Card Explanation

Any battle damage this cards inflicts to your opponent is treated as effect damage instead.

Delivers the final blow. Combined with Union Attack, this effect allows us to achieve the "Victory by Effect Damage only" bonus, which equals 1,000 Duel Assessment Points.

Only one copy is available and needed.

Required to enable our Gravekeeper's Vassal to attack directly.

Union Attack

Used to boost Gravekeeper's Vassal's ATK.

Run enough copies to raise its total ATK over 9,999.


Use either this, Straight Flush, or Trap Jammer to deal with Negate Attack.

Master of Oz

As mentioned earlier, with two Union Attack, we need at least 9,300 more ATK if we want to boost Gravekeeper's Vassal's ATK to over 9,999.

Master of Oz is used here for several reasons:

  • With 4200 ATK and two Union Attack, we only need 500 or more ATK.
  • Can achieve the Fusion Summon and Special Summon bonus.
  • Only requires two Fusion Materials
  • Mokuba's monsters cannot get over it

Keep these in mind when choosing alternatives.

Replacement/Tech Cards
Card Explanation

Alternative to Crystal Seer.

Other options are:

  • 2-3 Gather Your Mind
  • 2-3 Thunder Dragon
  • Dark Mimic LV1
  • Dark Mimic LV3
  • Shard of Greed


Fusion Gate

Alternative to Polymerization. Can be used as Storm fodder.

Alternative to Lucky Iron Axe.

Other options:

  • Black Pendant
  • Reinforcements
  • Shield & Sword
  • Wicked-Breaking Flamberge - Baou
  • Sword of Deep-Seated
  • Inspiration
  • Rising Energy

Alternative for the 2nd copy of Union Attack. Chain this to your activation of Union Attack. Make sure your Self-Chain setting is ON.