Subterror Krawler is a Control Deck in Yu-Gi-Oh Master Duel, which takes advantage of two archetypes that are known for their monsters' Flip Effects. Check out the core deck list, key combos, as well as tips how to play & counters against this Deck!

Subterror Krawler Deck List

Main Deck: 40 cards
x3	x3	x2	x2	x2
x2	x1	x1	x1	x1
x1	x1	x1	x1	x3
x3	x2	x2	x1	x2
x2	x1	x1	-	-
Extra Deck: 15 cards
x1	x1	x1	x1	x2
x1	x1	x1	x1	x1
x1	x1	x1	x1	-

Subterror Krawler Breakdown

Tier Evaluation

Tier Ranking
Rogue Tier
Deck Archetype		Deck Difficulty
Control		Easy
Deck Evaluation
Archetypes heavy with Flip Effects provide powerful control into a defensive playstyle Extra Deck is highly optional, as most of the Deck's strength lies in Main Deck Subterror has a dedicated hand trap that can negate effects, and will look to recycle it a lot

Subterror Control Deck Guide: How to Play

Playstyle and Win Condition

Both Subterror and Krawler archetypes gain their benefits from using Flip Effects to control the field. Compared to other Control Decks, this is somewhat slower, but against unprepared Duelists this can be quite a surprise and a pain to counter.

The two does have some synergy together, with a little help from some World Legacy cards.

Main Deck Monsters

These two cards are crucial in any kind of Subterror Deck. Subterror Guru's flip effect searches out any "Subterror" card from the Deck, which is most often used to get Subterror Fiendess.

Subterror Fiendess is essentially a hand trap that negates a card or effect. It also flips a targeted "Subterror" monster back to face-down Defense Position, letting it recharge its Flip Effect.

Subterror Nemesis Defender is another hand trap that counters targeted effects, as it can redirect them to a different appropriate target. Both of them also share the same effect that lets them be Special Summoned, if a face-up monster you control is flipped face-down.

The two Behemoth monsters have pretty potent Flip Effects if triggered. Subterror Behemoth Voltelluric can take control of a Set monster the opponent controls, and Subterror Behemoth Umastryx banishes a monster instead.

Krawler Soma, the newest addition to the "Krawler" archetype, provides so much for Flip Monsters in general, and is a good addition to the Deck. It can Special Summon itself by flipping a monster you control face-down, and can reduce its Level to Special Summon even more "Krawler" monsters immediately face-down.

Each of the "Krawlers" provide their own effects for their Flip Effects. Krawler Axon destroys a Spell/Trap card, Krawler Glial can Special Summon a fellow "Krawler" monster in face-down Defense Position, Krawler Ranvier can recycle monsters from the GY, and Krawler Spine can destroy a monster the opponent controls.

The boss monster among the archetype is Deus X-Krawler, which can negate effects that target this card when face-down. Afterwards, it immediately negates all monsters the opponent currently controls upon effect resolution. When destroyed, it can replace itself with another Level 9 monster.

That monster would be Pot of the Forbidden, with its various effects related to famously banned cards providing chances to further gain advantage, or turn things around.

Spell and Trap Cards

Both archetypes have their respective Field Spells, and they can be used one after the other to set up the field.

The Hidden City helps you search out a "Subterror" monster, which is usually Subterror Guru. It can also negate attacks by flipping said monsters face-up, thereby also triggering their Flip Effects.

World Legacy Shadow gives "Krawlers" a small stat boost, and the ability to Special Summon them face-down. It also sends a monster that destroys one of your Flip monsters to the Graveyard.

World Legacy Survivor is an excavation search for the "Krawler" archetype. Though, keep in mind: using this Spell Card will lock you into Link Monsters as Special Summons for the rest of the turn.

World Legacy Monstrosity provides power by Special Summoning Level 9 monsters--and there are a couple of them in this Deck.

As for Traps, there's only a handful of them but provide essential synergy to the Deck. Lost Wind can deal with dangerous boss monsters that have Effects, negating them and slashing their ATK by half as well.

World Legacy Pawns can help Set the monsters you control back to face-down Defense Position, and can keep doing in subsequent turns as a Continuous Trap.

The two "Subterror" Traps are crucial in maintaining resources. Subterror Succession refreshes your hand with Flip monsters to keep Setting on the field, while Subterror Final Battle is a dream of a card for Flip Monsters--from switching battle positions to increasing a chosen stat to protect themselves, and "Subterror" effects cannot be negated for the rest of the turn.

Extra Deck Monsters

Thunder Dragon Colossus can actually be cheated out through Subterror Behemoth Voltelluric due to it being a Thunder-type monster. Naturia Beast is a hard counter against Spell-heavy Decks, so long as it can keep milling cards to trigger its effect.

Cyberse Quantum Dragon provides protection to Link Monsters from attacks, and can bounce monsters they control to launch a second attack. Black Rose Moonlight Dragon can bounce a monster the opponent controls, provided they're Level 5 or higher that was Special Summoned.

Both archetypes' respective Link Monsters are all LINK-2, which makes them easy to summon given this is a Control Deck.

Subterror Behemoth Fiendess gets stronger depending on the Levels of the monsters it used as material, and can Special Summon "Subterror" monsters in face-down Defense Psition.

Each of the X-Krawler Link Monsters provides benefits to fellow "Krawler" monsters it points to such as a stat boost and immunity to battle destruction, which can be hard to give given their Link Markers are pointed left and right. It also boasts a floating effect that Special Summons two "Krawler" monsters from the GY.

X-Krawler Neurogos doubles the battle damage of monsters pointed by its Link Markers, X-Krawler Synaphysis can give them the ability to attack twice, and X-Krawler Qualiark provides more effects the more "Krawler" monsters you control on the field.

If you're running Link Monsters, the Knightmare monsters are always a staple. It never hurts to run Knightmare Cerberus, Knightmare Phoenix, and Knightmare Unicorn in any Deck--and Subterror Krawlers are no exception.

Most of the monsters in this Deck are EARTH Attribute, which is why Missus Radiant is a good option to consider as a LINK-2 for the added stat boost.

Borreload Dragon and Accesscode Talker are LINK-4 Monsters that are overwhelming to deal with, and are often summoned for game-winning plays.

Core Combos and Interactions

Sample Combo 1

Say you have a hand like this, this is maximizing as many Set monsters on the field as soon as possible. After all, most of the monsters have Flip Effects.

Card(s) on Hand
Step	Description
1	Activate One for One; discard Subterror Behemoth Umastryx, and Special Summon from the Deck Subterror Fiendess.
2	Activate the effect of Subterror Fiendess; flip it face-down, and Special Summon in face-down Defense Position Subterror Behemoth Voltelluric.
3	Set Krawler Ranvier.

Sample Combo 2

So long as you have either Terraforming or a copy of The Hidden City, this combo gives you a monster on the field and a free hand trap on hand to negate effects with.

Card(s) Needed
Step	Description
1	Activate Terraforming, and search out a copy of *The Hidden City.
2	Activate The Hidden City; upon activation, use its effect, and search out a copy of Subterror Guru from the Deck.
3	Set Subterror Guru. Then, activate the second effect of The Hidden City; target Subterror Guru and flip it face-up. In most cases, flip it up in Defense Position.
4	Activate Subterror Guru's Flip Effect, and search out a copy of Subterror Fiendess to add to your hand.

Boss Monsters

	Accesscode Talker
	A classic staple for Decks that can run LINK-3 Monsters like Knightmare Unicorn, Accesscode Talker is a great endgame boss monster to summon, due to its high ATK through its effect and the opponent being unable to respond to its card destruction effect.
	Deus X-Krawler
	Deus X-Krawler's effect is unique in that it can flip itself face-up to negate an effect that targeted this card while Set. Then, once it's flipped face-up, it automatically negates the effects of all the opponent's activated monster effects.
	Borreload Dragon
	Adding some firepower to the list of Extra Deck monsters is Borreload Dragon. Easier to summon as a LINK-4 just like Accesscode Talker, this card is untargetable by card effects, and has a stat-dropping effect against the opponent's monsters that they cannot respond to. If it attacks, it can take control of it to a Monster Zone pointed to by its Link Markers.
	Pot of the Forbidden
	Best when worked in tandem with Deus X-Krawlers effect, Pot of the Forbidden has a plethora of effects that can turn the tide of the Duel using its Flip Effect. From effects that are similar to Pot of Greed, Raigeki, Giant Trunade, and The Forceful Sentry, it has something for any situation.

Subterror Krawler Counters: How to Beat

Best Decks to Use Against Subterror Krawler

Labrynth Control

Flip Effects are a little slower to trigger their essential effects, compared to a Trap Card-centric Deck like Labrynth Control. Most of the Trap Cards the Deck runs don't even force monsters to be flipped up, thereby completely dodging the Deck's biggest strengths.

Labrynth Control Deck Guide

Runick Control

Runick Control Decks will try to make sure this Deck doesn't even get to their key cards by banishing as much of your own Deck as possible. Their consant recursion of resources make it incredilby hard to battle against this archetype.

Runick Deck Lists
Pure Runick	Spright Runick
Ishizu Runick	Naturia Runick

Dinomorphia

Another Trap-centric Deck, Dinomorphia Decks have a way to nullify even Flip Effects through one of their boss monsters having an effect similar to Skill Drain so long as it's meeting certain conditions.

Dinomorphia Deck Guide

Best Cards to Tech Against Subterror Krawler

	Skill Drain
	Because Flip Effects only trigger if the monster that is flipped face-up on the field, they are technically still susceptible to Skill Drain once they're face-up and active on the field.
	Effect Veiler
	Effect Veiler essentially has the same strategy with Skill Drain in denying Flip Effects from triggering as soon as they're face-up on the field. However, timing matters for this card, as it can only negate Effect Monsters during the opponent's Main Phase.
	Evenly Matched
	If this Deck manages to get multiple Set monsters, be ready to intercept an Evenly Matched from the opponent if they go second. This card can easily shut down multiple flip effects even before they can even be flipped up at all.
	Infinite Impermanence
	In this case against Flip Effects, Infinite Impermanence might be better triggered on the field instead of from the hand--unless you do not control anything face-up on your side of the field when the Flip Effect activates.

Related Packs to Subterror Krawler

Cosmic Mechanical Entities	Denizens of Sacred Tree Grove
Exquisite Jet-Black Rose	Legacy Pack
Master Pack	Passage of the Sun
Roaring Thunder	Shot Through Fiction
Soldiers from the Storm	Worthy Adversaries

Yu-Gi-Oh Master Duel Related Guides

Yu-Gi-Oh Master Duel Deck Archetypes

Yu-Gi-Oh Master Duel Decks

Deck Tier List: Best Decks for Season 35

List of All Covered Decks

World Champion Decks

2024 World Champions: Team 7
Horus Tearlaments	Yubel	Fire King Snake-Eyes
Salamangreat	Purrely	Vanquish Soul

Decks Used in Worlds 2024

Decks Used By All Teams in Worlds 2024
snipehunters	CER	Hero's Future
BOTB	MYYGO	Thank Love
CER 2 x FCG	BRAZ IL	Maxx “Yee”
Double Noir	Rogue Ruler

Aggro Decks

List of All Aggro Decks
D/D/D Aggro	Code Talker / Prank Kids	Zoodiac
Blue-Eyes	Virtual World	SPYRAL Control
Toon Kingdom	Red-Eyes	Blue-Eyes
Zoodiac	Prank-Kids	Zoodiac Tri-Brigade
Pure Tri-Brigade	Ancient Gear	Dragonmaid
Tri-Brigade Lyrilusc (Bird Up)	Dinosaur	Raidraptor
HERO	Dragon Link	Despia
Magikey	Adamancipator	Black Luster Soldier
Pendulum Magician	Stardust Dragon	Tenyi Swordsoul
Cyberdark	@Ignister	Cyber Dragon
The Winged Dragon of Ra	Despian Predaplant	Despia Darklord
Odd-Eyes Performapal	Numeron FTK	Six Samurai
ABC	Trickstar Windwitch	Blackwings
Fluffal	Cupid Pitch Turbo	Lunalight
Vampire	Ultra Athletes	Thunder Dragon
Z-ARC Pendulum Magician	Adventurer Rose Dragon Tenyi	Adventurer P.U.N.K.
Suship	Pure D/D/D	Numeron Egyptian Gods
Galaxy Eyes OTK	Borrelend Dragon Link	Vaylantz
Beetrooper	Icejade Ra	Therion ABC
Libromancer	Mathmech	Spright Evil☆Twin
Spright Tri-Brigade	Ishizu Chaos	Slifer Arcana Knights
Gaia OTK	Vernusylph	Ancient Warriors
Ghoti	Springans	8-Axis Gizmek Orochi
Danger! Dark World	Mikanko	Scareclaw Kashtira
Zombie World P.U.N.K.	Hungry Burger Nouvelles	Obelisk the Tormentor
Mannadium	Gate Guardian	Gold Pride P.U.N.K.
Superheavy Samurai	Nemleria	Dragon Rulers
Snake-Eye	T.G. Diabellstar	Skull Servant
Kaiju	Resonators	Earthbound
Malefic	Kozmo	Armored Xyz Shark
Unchained	Battlin' Boxer	Chimera Illusion
Fire King Snake-Eyes	Vaalmonica	Memento
Horus Tearlaments	Centur-Ion	Dragon Master Magia
Ice Barrier	Infernoid	Lightsworn
Ogdoadic Ragnaraika	Genex	Tenpai Dragon
Goblin Biker	Infernoble	Armed Dragon
Flame Swordsman	Melodious

Control Decks

List of All Control Decks
Invoked Shaddoll	Eldlich Control	Drytron Fairy
True Draco	Dark Magician	Traptrix
Phantom Knights	Madolche	Relinquished
P.U.N.K.	DPE Scythe	Evil★Twin
Paleozoic Frog	Salamangreat	Gravekeepers
Monarch	Tellarknight	Agent
Exosisters	Darklord	Plunder Patrol
Rikka	Floowandereeze	Adventurer Phantom Knights
Dinomoprhia	Tri-Brigade Gladiator Beast	Adventurer Witchcrafter
Dark Magician Gravekeeper	Branded Tri-Brigade	Branded Despia
Zombie Vampire	Blue-Eyes Jet Dragon	Spellbook
Branded Cyber Dragon	Branded Zombies	Pure Scareclaw
Dinomorphia	Runick	Labrynth
Harpies	Buster Blader	Umi Control
Endymion	Nekroz	Spright
Spright Runick	Ishizu Runick	Branded Ishizu
Crystal Beasts	Orcust	Altergeist
Witchcrafter	Subterror Krawler	Mayakashi
Ishizu Tearlaments	Evilswarm	Melffy Spright
Bystial Branded	Dogmatika Bystial	Naturia Runick
Generaiders	Kashtira	Purrely
Ninja	Rescue-ACE	Gishki Spright
Prediction Princess	Vanquish Soul	Jinzo
Egyptian God	Ojama Control	Aromage
Ghostrick	Kuriboh	Anti-Meta Stun
Runick Spright Fur Hire	Horus Control	Toy Box Dark Magician
Yubel	Voiceless Voice	Rikka Ragnraika
Ritual Beast	Shining Sarcophagus

Burn Decks

List of All Burn Decks
Red-Eyes Burn	Timelord Burn	Chain Burn
D.D. Dynamite	Igknight OTK	Cubic
Dinosaur Bishbaalkin FTK	Volcanic Snake-Eyes	Transaction Rollback Burn

Alt-Win Decks

List of All Alternate Win Decks
Crooked Cook Exodia	Flower Cardian Exodia	Treasure Panda Exodia
Suicide	Defense OTK

All Budget Decks

List of All Budget Deck Guides
Budget Shark Xyz	Budget Eldlich	Budget Hippo Turbo
Budget Despia	Budget F.A. Metalfoes	Budget Blue-Eyes White Dragon
Budget Chain Burn	Budget Majespecter	Budget Yosenju
Budget Flower Cardian	Budget True Draco	Budget Amorphage
Budget Ishizu Tearlaments

Best Cards for Decks

Lists of Best Cards for Deck Building
Best Staple Cards		Best Searchers		Best Hand Traps
Best Board Wipes		Best Negates		Best Fusion Monsters
Best Synchro Monsters		Best Xyz Monsters		Best Link Monsters
Best Structure Decks			Best Decks to Go 1st or 2nd