Therion ABC is an Aggro deck in Yu-Gi-Oh Master Duel. Check out the core deck list, key combos, as well as how to play & counters!

Therion ABC Deck List

Main Deck: 42 cards
x3	x3	x3	x3	x3
x2	x2	x2	x2	x1
x1	x1	x3	x3	x3
x2	x1	x1	x3
Extra Deck: 15 cards
x2	x1	x1	x1	x1
x1	x1	x1	x1	x1
x1	x1	x1	x1

Therion ABC Breakdown

Therion ABC Deck Guide: How to Play

Playstyle and Win Condition

As of writing, ABC-Dragon Buster has been officially made a Semi-Limited card in the Forbidden & Limited Card List, making it all the more viable for Decks that can run it. They are the best Union Monster-based Deck in the game, and no other Union-centric archetype comes even close to its playstyle and consistency.

The addition of a couple of "Therion" cards further boosts the consistency of the archetype, becoming a Deck Engine of sorts that extends the combo capabilities of the Deck and becoming even more aggro than before.

The two "Therion" cards in question to add for this Deck is Therion "King" Regulus--the dedicated support for other Machine-type archetypes--and Therion Discolosseum, the exclusive "Therion" Field Spell.

Therion "King" Regulus has a very powerful effect of Special Summoning itself. This is where it becomes synergistic with the ABC archetype, as it also equips a Machine-type monster from the GY. Union Monsters usually have effects while being equipped to a monster, like Special Summoning itself from the Spell/Trap Zone. It also has a bonus effect of being able to negate a card of effect by discarding or sending from the field to the GY 1 "Therion" Monster.

The Field Spell Therion Discolosseum acts as a searcher for "Therion" Monsters, which is going to be essential for making the Deck's combos work. It also provides overall protection to monsters from being destroyed by battle, sending a "Therion" Monster or a copy of Endless Engine Argyro System. It also has the ability to recycle a "Therion" monster from the GY back to the hand if another monster is destroyed by battle.

The ABC Archetype is the centerpiece and main focus of the Deck, with A-Assault Core, B-Buster Drake and C-Crush Wyvern serving as the main monsters in the Deck. Each one of them have effects that trigger when sent to the GY; Assault Core recycles a Union monster back to the hand, Buster Drake searches a Union monster from the Deck, and Crush Wyvern Special Summons a Union monster from the hand.

A monster equipped by any of the Union monsters from the ABC archetype enjoy immunity from effects from specific card types; A-Assault Core provides protecton from Effect Monsters, B-Buster Drake gives immunity from Spell Card effects, and C-Crush Wyvern protects the monster from all Trap Card effects.

These three monsters need to be in the GY, and then banished as material in order to Special Summon ABC-Dragon Buster. This monster, at the cost of discarding a card, can target any card on the field and banish it. If this card gets targeted, it has a Quick Effect of its own to tribute itself, then Special Summon three Union monsters with different names on the field.

This combo can potentially open up more plays for the user, what with the ABC monsters being Level 4 monsters. Link and Xyz Summoning are open opportunities in this Deck, thus feel free to adjust at one's discretion.

Another card key for Union monsters and Machine-type monsters is the Field Spell Union Hangar. Union Hangar benefits from Union Monsters so much, it can act as a one-card combo starter.
Upon activation, this card can search out ane one LIGHT Machine Union monster from the Deck to add to the hand--very specific for the ABC archetype.

Unfortunately, Union Carrier has been made Forbidden, which means players cannot rely on it anymore to constantly bring out the key boss monster, and the Deck as a whole has gotten a lot slower compared to before.

To make up for the loss of Union Carrier, some space is needed to add in the Adventurer Engine, to both provide some presence on the field and have a free omni-negate while the Adventurer Token is on the field.

If you have either Rite of Aramesir or Water Enchantress of the Temple on your starting hand, always try to open with their signature combo.

With the main focus of the Deck circling around the ABC and Therion monsters, the rest of the Deck can be filled with classic staples and floodgates to protect or enhance the Deck's performance in a Duel. Cards like Ash Blossom & Joyous Spring, Maxx "C", Called by the Grave and Infinite Impermanence will always have a place in any Deck, including this one.

If there is more space, situational ones will also make do, like Crossout Designator and Nemeses Corridor, which can easily be used as material fodder for Thunder Dragon Colossus.

Core Combos and Interactions

This section is currently in construction. New combos are in the works!

Fateful Adventure into ABC

Players can actually catch their opponent off-guard bty bringing out the titular boss monster with just a Union Hangar and Fateful Adventure on hand.

Card(s) Needed
Step	Description
1	Activate Union Hangar, and search out a copy of B-Buster Drake, then Normal Summon it to trigger the Field Spell's effect, to search out and equip A-Assault Core from the Deck to B-Buster Drake in the Spell/Trap Zone.
2	Activate Fateful Adventure from the hand; search out a copy of Water Enchantress of the Temple to the hand, and discard C-Crush Wyvern.
3	Activate Water Enchantress of the Temple from the hand; banish it, and search out a copy of Rite of Aramesir from the Deck to the hand.
3	Activate Rite of Aramesir to Special Summon an Adventurer Token onto your field. If players have Wandering Gryphon Rider on hand, they can Special Summon it right after bringing out the Adventurer Token.
4	Upon the Adventurer Token being Special Summoned, this triggers the effect of Fateful Adventure; search Dracoback, the Rideable Dragon from the Deck and equip it to the Adventurer Token.
5	Banish A-Assault Cannon and B-Buster Drake from the field, along with C-Crush Wyvern from the GY; Special Summon *ABC-Dragon Buster from the Extra Deck.

Active Field Spell: Union Hangar
			X
-			-	-

This provides a free banish from ABC-Dragon Buster, while providing a bounce effect through Dracoback and an omni-negate effect from Wandering Gryphon Rider. Players will have to pray this combo goes completely uninterrupted to achieve this end goal of a field.

Union Carrier One-Card Combo

NOTE: This combo is currently illegal in Ranked Duels as Union Carrier has been banned as a Forbidden card.

Card(s) Needed
Step	Description
1	Activate Union Hangar, and search out a copy of B-Buster Drake, then Normal Summon it to trigger the Field Spell's effect, to search out and equip Union Driver from the Deck to B-Buster Drake in the Spelll/Trap Zone.
2	Activate the effect of Union Driver; banish this card, then search out and equip A-Armored Core from the Deck to B-Buster Drake. Then, activate the effect of A-Armored Core; Special Summon it onto the Main Monster Zone.
3	Using A-Armored Core and B-Buster Drake as material, Link Summon Union Carrier.
4	Upon being sent to the GY, activate the second effects of A-Armored Core and B-Buster Drake into a Chain; search out C-Crush Wyvern to add to the hand, and add back B-Buster Drake from the GY. Then, activate the second effect of Union Carrier; search out and equip Photon Orbital to the Link Monster.
5	Activate Photon Orbital's effect; send itself from the Spell/Trap Zone to the GY, and search out a copy of Galaxy Soldier from the Deck to add to the hand. Then, activate the effect of the newly-searched Galaxy Soldier; discard C-Crush Wyvern from the hand to the GY, and Special Summon it to the field in face-up Defense Position.
6	Activate the second effect of Galaxy Soldier that was Special Summoned onto the field, then add another copy of Galaxy Soldier to the hand. Special Summon the new copy like how you did the first through its effect, discarding the B-Buster Drake you had on hand as cost.
7	Using the two Galaxy Soldiers on the field as materials, Xyz Summon Infinitrack River Stormer. Then, activate its effect by detaching one of the materials, and search out a copy of Therion "King" Regulus to add to the hand.
8	Activate Therion "King" Regulus from the hand; Special Summon it, and equip B-Buster Drake from the GY to the Effect Monster in the Spell/Trap Zone. Then, using its own effect, Special Summon the B-Buster Drake from the Spell/Trap Zone to the Main Monster Zone.
9	Using Infinitrack River Stormer and B-Buster Drake as materials, Link Summon I:P Masquerena. Then, activate the effect of B-Buster Drake, and search out the second copy of B-Buster Drake from the Deck to the hand.
10	Banishing A-Assault Core, B-Buster Drake and C-Crush Wyvern from the GY to act as materials, to Special Summon ABC-Dragon Buster from the Extra Deck.

Active Field Spell: Union Hangar
			X
-	-	-	-	-

All the player needs is a single Union Hangar to commit to this combo, and the possibilities are endless starting from there. For example, if the player does not need to send any more materials required for ABC-Dragon Buster from the hand or if the player goes second; instead of summoning Infinitrack River Stormer they can opt to summon Cyber Dragon Nova as a lead-up to Cyber Dragon Infinity.

Boss Monsters

	ABC-Dragon Buster
	The main Boss Monster of this Deck, ABC-Dragon Buster can be summoned onto the field by banshing that materials it requires, either from the field or in the GY. Discarding a card with its first Quick Effect can let it banish a card from the field, while its second Quick Effect lets it essentially Special Summon the materials it banished in order to summon this card.
	Thunder Dragon Colossus
	An option made availble with the assist from Nemeses Corridor, Thunder Dragon Colossus acts as a floodgate of sorts against the opponent, preventing them from adding cards outside of drawing cards. If players opt to add more Thunder monsters as support for this Deck, this monster can also protect itself from being destroyed by battle or card effect.
	Cyber Dragon Infinity
	A staple for Machine-type monster-heavy Decks, especially if they can get to use Level 5 monsters for material to kickstart with Cyber Dragon Nova. Cyber Dragon Infinity gets stronger for each material attached to the card, and it can make itself stronger as it can absorb Attack Position monsters. This monster can also negate card or effects as a Quick Effect, acting as another floodgate.
	Accesscode Talker
	Accesscode Talker is a mandatory choice for any deck that can do Link Climbing with their Link Monsters. Using a LINK-3 monster as material to summon this card can get its ATK up to 5300, and it also has a neat effect of destroying cards on the field by banishing a Link Monster from the GY with different attributes. On top of that, no card nor effect can respond to this card's effect activation, making this a solid end-game closer for the Deck.

Therion ABC Counters: How to Beat

Best Decks to Use Against Therion ABC

Runick

One of the current Decks on top of the meta as of writing, Runick Decks are hard to stop once they have the consistent loop of recycling their Quick-Play Spells to the Deck and drawing cards. It's safe to bring a couple of cards that can counter this Deck, like Chaos Hunter. If not, then hope you go first against the Runick player.

Runick Control Deck Guide

Branded Despia

A Deck, and even a Deck Engine, that seemingly has an out for any scenario against it, Branded Despia has one of the most flexible playstyles in the current meta of Master Duel. From being aggressive to applying pressure through control, Branded Despia decks seem to always have the right cards at the right time. On top of that, its ability to go with numerous archetypes makes it unpredictably dangerous.

Branded Fusion Decks
Branded Tri-Brigade	Branded Despia
Branded Cyber Dragon	Branded Zombies
Branded Ishizu	Branded Dragonmaids

Cyber Dragon

Cyber Dragons can take advantage of the fact that most of the monsters in a Therion ABC deck will have Machine-type monsters. All it takes is one Cyber Dragon to easily get them off the field and be used as Fusion Material, for monsters like Chimeratech Fortress Dragon or Chimeratech Megafleet Dragon.

Cyber Dragon Deck Guide

Best Cards to Tech Against Therion ABC

	Chaos Hunter
	To get to ABC-Dragon Buster, lots of Special Summons will have to be made to get to that point. It also has a prerequisite of needing the materials to be banished. In the current meta topped with Runick and banish-heavy decks, Chaos Hunter is one of the strongest counters against this kind of playstyle. So long as this card is on the field, players cannot summon ABC-Dragon Buster.
	Cyber-Stein & Naturia Exterio
	The combo of Cyber-Stein and Naturia Exterio has gotten a lot more popular as of late to be an easy way to get an unlimited amount of negates of Spells and Trap Cards, even if it means sending cards to the Graveyard, and banishing them as well. However, if the Fusion Monster manages to get on the field early in a Duel, it might be difficult to counter against.
	Necrovalley
	The original floodgate, Necrovalley prevents effects that moves cards out of the Graveyard to somewhere else in a Duel. It also prevents cards from being banished, and having the monsters in the GY have their Type or Attribute altered through card effects. Multiple decks can run this card as a cheeky counter, especially for a meta defined by cards being banished.
	Skill Drain
	Skill Drain effectively freezes this Deck by negating the effects of all monsters that are on the field, so long as this Continuous Trap Card remains face-up and active on the field. This effectively makes sure that combos that start and continue with the effect monsters from the Main Deck are unusable until the Trap Card is taken off the field.
	Summon Limit
	As the Deck needs multiple Special Summons in order to get into its boss monsters, Summon Limit restricts the summon capabilites of both players to just two per turn. Making each summon count is important from here on in, and effectively controls the playstyle of ABC Therion until the card is taken off the field.

Related Packs to Therion ABC

Cosmic Mechanical Entities	Emblazoned Armor
Heroic Warriors	Legacy Pack
Master Pack	Nebula Cyclone
Pearlescent Cyber Dragons	Roaring Thunder
Shifting Gears	Soldiers from the Storm
Space-Time Transcendents

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