Labyrinth Builder (Catapult Turtle) to beat/farm Dr. Crowler Lvl 40

Duel Links Catapult Turtle deck to beat Vellian Crowler, decks to farm Vellian Crowler, how to farm Vellian Crowler.
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Table of contents


Activate the skill to summon Labyrinth Wall in Defense Position during the first turn. Your goal is stall with it, along with some support cards, until the final turn.

Obtainable score7,000 - 8,000
Essential skillLabyrinth Builder
Essential cards

Example deck

Catapult TurtleA Cat of Ill OmenA Cat of Ill OmenPlanet PathfinderPlanet PathfinderPlanet Pathfinder
Soul ExchangeStormAcidic DownpourAcidic DownpourAcidic DownpourDimension Gate
Dimension GateDimension GateGood Goblin HousekeepingGood Goblin HousekeepingGood Goblin HousekeepingJar of Greed


[Skill] descriptionUser
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.

Paradox Brothers

How to use this deck


(Base ATK)
Acidic Downpour (Active)Acidic Downpour (Inactive)
Ancient Gear Beast
Ancient Gear Beast


1900 ATK is needed.

1000 ATK is needed.
Ancient Gear Golem
Ancient Gear Golem


900 ATK is needed.

0 ATK is needed.
Ancient Gear Knight
Ancient Gear Knight


2100 ATK is needed.

1200 ATK is needed.


To try and prevent these attacks, we use a combination of both Dimension Gate and Massivemorph. Dimension Gate’s effect would leave us wide open for a direct attack, but Massivemorph prevents his monsters from doing so. (Remember, Crowler will only attack with monsters strong enough to break through Labyrinth Wall’s high DEF.)

Deck thinning counter

To counter the deck thinning from Spell Gear and Ancient Gear Box, we use our own: Planet Pathfinder, Good Goblin Housekeeping, and Jar of Greed.

Important Notes:

  • There are a total of 5 key cards: Catapult Turtle, Soul Exchange, Storm, and your two copies of Massivemorph. (See the Card Choice and Final Turn section for more information.)
  • Apparently, Crowler does not tribute the monster that has been targeted by the effect of Massivemorph. Although, this has not been confirmed, so to be safe, activate it at the final turn.
  • Do not set Soul Exchange if Storm has not been activated.

Final Turn

Card Choices:

Planet Pathfinder
Planet Pathfinder
Thins our deck and searches for Acidic Downpour, adding it to our Hand.
A Cat of Ill Omen
A Cat of Ill Omen
Places a Trap Card (of your choice) from the Deck to the top of the Deck
Catapult Turtle
Catapult Turtle
Deals the final blow for us and allows us to achieve the Victory by Effect Damage Only bonus. Used in combination with Soul Exchange. See the Final Turn section.
Acidic Downpour
Acidic Downpour
Activate this as soon as possible. Its main purpose is to increase the DEF of our Labyrinth Wall by 400 and decrease Crowler’s monsters ATK by 500.
Soul Exchange
Soul Exchange
Used in combination with Catapult Turtle. See the Final Turn section.
Used to destroy Dimension Gate and Acidic Downpour.
Dimension Gate
Dimension Gate
Protects Labyrinth Wall by removing it from play.
Good Goblin Housekeeping
Good Goblin Housekeeping
Serves as draw power, allowing us to obtain the cards we need and it can prevent one copy of Massivemorph being placed at the bottom

Supplies additional ATK for the Over 9,999 Damage achievement.


Darth Kythos
Well, a little late, since everyone probably already has every card and him farmed, but still thanks for the great work!
<< Anonymous(Darth Kythos)
Anonymous Reply
No i dnt understand how to use this deck
<< Anonymous(Darth Kythos)
Anonymous Reply
No i dnt understand how to use this deck

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Comments (updated every hour)

It's even worse - it's 500 ATK after the ENTIRE chain link 2 or higher resolve. It&#...
Probably most people already knew at this point, but if you use Sera against Aigami, they'll...
Very sure that anon was being sarcastic.
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