Goblin Welder + Retreat to Coralhelm + Darksteel Citadel + Ancient Den

Goblin Welder
Retreat to Coralhelm
Darksteel Citadel
Ancient Den

Requires
Goblin Welder must be on the battlefield. Retreat to Coralhelm must be on the battlefield. Darksteel Citadel must be in the graveyard. Ancient Den must be on the battlefield. Goblin Welder does not have summoning sickness.
Steps
  1. Activate Goblin Welder by tapping it, causing you to sacrifice Ancient Den and return Darksteel Citadel from your graveyard to the battlefield.
  2. Darksteel Citadel enters the battlefield, triggering Retreat to Coralhelm, untapping Goblin Welder.
  3. Activate Darksteel Citadel by tapping it, adding .
  4. Activate Goblin Welder by tapping it, causing you to sacrifice Darksteel Citadel and return Ancient Den from your graveyard to the battlefield.
  5. Ancient Den enters the battlefield, triggering Retreat to Coralhelm, untapping Goblin Welder.
  6. Activate Ancient Den by tapping it, adding .
  7. Repeat.
Results
Infinite colorless mana. Infinite landfall triggers. Infinite white mana.

Ishai, Ojutai Dragonspeaker // Toggo, Goblin Weaponsmith
11.43% of 35 decks 4 decks
Breya, Etherium Shaper
0.01% of 13853 decks 2 decks
Dr. Madison Li
0.03% of 3967 decks 1 decks
Liberty Prime, Recharged
0.03% of 2915 decks 1 decks
Bjorna, Nightfall Alchemist // Sophina, Spearsage Deserter
0.63% of 158 decks 1 decks
High Synergy Cards
Great Furnace
100% of 9 decks +94% synergy
Seat of the Synod
100% of 9 decks +94% synergy
Esper Sentinel
78% of 9 decks +57% synergy
Ruin Ghost
56% of 9 decks +55% synergy
Foundry Inspector
56% of 9 decks +51% synergy
Etherium Sculptor
56% of 9 decks +50% synergy
Krark-Clan Ironworks
44% of 9 decks +43% synergy
Treasure Vault
44% of 9 decks +42% synergy
Urza, Lord High Artificer
44% of 9 decks +41% synergy
Goblin Engineer
44% of 9 decks +41% synergy
Top Cards
Swords to Plowshares
56% of 9 decks -7% synergy
Reckless Fireweaver
44% of 9 decks +40% synergy
Dispatch
44% of 9 decks +39% synergy
Felidar Retreat
44% of 9 decks +37% synergy
Wayfarer's Bauble
44% of 9 decks +34% synergy
Enlightened Tutor
44% of 9 decks +27% synergy
Rhystic Study
44% of 9 decks +17% synergy
Cyclonic Rift
44% of 9 decks +17% synergy
Creatures
Imskir Iron-Eater
100% of 1 decks +99% synergy
Sphinx of the Revelation
100% of 1 decks +97% synergy
Guide of Souls
100% of 1 decks +96% synergy
Marionette Apprentice
100% of 1 decks +92% synergy
Hell's Caretaker
50% of 2 decks +50% synergy
Rex, Cyber-Hound
50% of 4 decks +49% synergy
Roil Cartographer
50% of 2 decks +49% synergy
Urza, Chief Artificer
50% of 2 decks +48% synergy
Jan Jansen, Chaos Crafter
50% of 2 decks +47% synergy
Marionette Master
50% of 2 decks +46% synergy
Orcish Bowmasters
50% of 2 decks +39% synergy
Lotho, Corrupt Shirriff
50% of 2 decks +35% synergy
Walking Atlas
33% of 9 decks +33% synergy
Dreamscape Artist
33% of 9 decks +33% synergy
Myr Retriever
33% of 9 decks +31% synergy
Teshar, Ancestor's Apostle
33% of 9 decks +31% synergy
Puresteel Paladin
33% of 9 decks +30% synergy
Sai, Master Thopterist
33% of 9 decks +30% synergy
Enthusiastic Mechanaut
33% of 9 decks +29% synergy
Imperial Recruiter
33% of 9 decks +27% synergy
Jhoira, Weatherlight Captain
33% of 9 decks +27% synergy
Solemn Simulacrum
33% of 9 decks +19% synergy
Assaultron Dominator
25% of 4 decks +24% synergy
Cyberman Patrol
25% of 4 decks +24% synergy
Brotherhood Scribe
25% of 4 decks +24% synergy
Cybermen Squadron
25% of 4 decks +24% synergy
Glóin, Dwarf Emissary
25% of 4 decks +23% synergy
Oltec Matterweaver
25% of 4 decks +23% synergy
Dr. Madison Li
25% of 4 decks +22% synergy
Illustrious Wanderglyph
25% of 4 decks +22% synergy
Crime Novelist
25% of 4 decks +21% synergy
Skyswimmer Koi
22% of 9 decks +22% synergy
Electrostatic Pummeler
22% of 9 decks +22% synergy
Aethergeode Miner
22% of 9 decks +22% synergy
Scrapyard Recombiner
22% of 9 decks +22% synergy
Kemba, Kha Regent
22% of 9 decks +22% synergy
Quicksmith Genius
22% of 9 decks +22% synergy
Junk Diver
22% of 9 decks +22% synergy
Tameshi, Reality Architect
22% of 9 decks +22% synergy
Tunneling Geopede
22% of 9 decks +21% synergy
Roil Elemental
22% of 9 decks +21% synergy
Hedron Crab
22% of 9 decks +21% synergy
Master Transmuter
22% of 9 decks +21% synergy
Wurmcoil Engine
22% of 9 decks +20% synergy
Scrap Trawler
22% of 9 decks +20% synergy
Shimmer Dragon
22% of 9 decks +20% synergy
Myr Battlesphere
22% of 9 decks +20% synergy
Ruin Crab
22% of 9 decks +20% synergy
Thought Monitor
22% of 9 decks +19% synergy
Weathered Wayfarer
22% of 9 decks +19% synergy
Instants
Galvanic Discharge
50% of 2 decks +49% synergy
Tune the Narrative
50% of 2 decks +49% synergy
Rush of Inspiration
50% of 2 decks +48% synergy
Saw in Half
50% of 2 decks +47% synergy
An Offer You Can't Refuse
38% of 8 decks +17% synergy
Muddle the Mixture
22% of 9 decks +17% synergy
Mana Drain
22% of 9 decks +7% synergy
Path to Exile
22% of 9 decks -23% synergy
Dizzy Spell
11% of 9 decks +11% synergy
Exclude
11% of 9 decks +11% synergy
Second Sunrise
11% of 9 decks +11% synergy
Glimmer of Genius
11% of 9 decks +11% synergy
Faith's Reward
11% of 9 decks +10% synergy
Cosmic Intervention
11% of 9 decks +10% synergy
Kabira Takedown
11% of 9 decks +9% synergy
Sejiri Shelter
11% of 9 decks +8% synergy
Silence
11% of 9 decks +5% synergy
Force of Negation
11% of 9 decks +2% synergy
Force of Will
11% of 9 decks -0% synergy
Mystical Tutor
11% of 9 decks -4% synergy
Swan Song
11% of 9 decks -5% synergy
Fierce Guardianship
11% of 9 decks -7% synergy
Arcane Denial
11% of 9 decks -8% synergy
Brainstorm
11% of 9 decks -10% synergy
Generous Gift
11% of 9 decks -15% synergy
Counterspell
11% of 9 decks -32% synergy
Sorceries
Reiterating Bolt
100% of 1 decks +100% synergy
Localized Destruction
100% of 1 decks +99% synergy
Jolted Awake
100% of 1 decks +99% synergy
Season of Weaving
100% of 1 decks +96% synergy
Demonic Tutor
50% of 2 decks +28% synergy
Nahiri's Lithoforming
22% of 9 decks +22% synergy
Thoughtcast
22% of 9 decks +19% synergy
Sea Gate Restoration
22% of 9 decks +17% synergy
Idyllic Tutor
22% of 9 decks +17% synergy
Fabricate
22% of 9 decks +16% synergy
Sevinne's Reclamation
22% of 9 decks +15% synergy
Vandalblast
22% of 9 decks +6% synergy
Jailbreak
12% of 8 decks +12% synergy
Irenicus's Vile Duplication
12% of 8 decks +9% synergy
Mana Seism
11% of 9 decks +11% synergy
Planar Birth
11% of 9 decks +11% synergy
Saheeli's Directive
11% of 9 decks +11% synergy
Reverse Engineer
11% of 9 decks +11% synergy
Insult // Injury
11% of 9 decks +10% synergy
Open the Vaults
11% of 9 decks +10% synergy
Rise and Shine
11% of 9 decks +10% synergy
Expropriate
11% of 9 decks +9% synergy
Ondu Inversion
11% of 9 decks +9% synergy
Organic Extinction
11% of 9 decks +8% synergy
Wake the Past
11% of 9 decks +8% synergy
Dusk // Dawn
11% of 9 decks +8% synergy
Grapeshot
11% of 9 decks +7% synergy
Gamble
11% of 9 decks +1% synergy
Ponder
11% of 9 decks -2% synergy
Farewell
11% of 9 decks -2% synergy
Faithless Looting
11% of 9 decks -6% synergy
Utility Artifacts
Cranial Ram
100% of 1 decks +98% synergy
Aether Refinery
50% of 2 decks +49% synergy
Unstable Amulet
50% of 2 decks +48% synergy
Cranial Plating
50% of 2 decks +48% synergy
Thopter Foundry
50% of 2 decks +48% synergy
Izzet Generatorium
50% of 2 decks +47% synergy
Navigation Orb
38% of 8 decks +37% synergy
Amulet of Vigor
33% of 9 decks +32% synergy
Mishra's Bauble
33% of 9 decks +32% synergy
Cloud Key
33% of 9 decks +31% synergy
Crucible of Worlds
33% of 9 decks +31% synergy
Unwinding Clock
33% of 9 decks +31% synergy
Archaeomancer's Map
33% of 9 decks +29% synergy
Panharmonicon
33% of 9 decks +29% synergy
The One Ring
33% of 6 decks +24% synergy
Plasma Caster
25% of 4 decks +24% synergy
Automated Assembly Line
25% of 4 decks +24% synergy
Worldwalker Helm
25% of 4 decks +23% synergy
Simulacrum Synthesizer
25% of 4 decks +23% synergy
Decoction Module
22% of 9 decks +22% synergy
Gonti's Aether Heart
22% of 9 decks +22% synergy
Seer's Sundial
22% of 9 decks +22% synergy
Altar of the Brood
22% of 9 decks +21% synergy
Hammer of Purphoros
22% of 9 decks +21% synergy
Ichor Wellspring
22% of 9 decks +20% synergy
Sculpting Steel
22% of 9 decks +20% synergy
Mystic Forge
22% of 9 decks +19% synergy
Sword of the Animist
22% of 9 decks +18% synergy
Skullclamp
22% of 9 decks +10% synergy
Encroaching Mycosynth
17% of 6 decks +15% synergy
Bladehold War-Whip
17% of 6 decks +15% synergy
Portal to Phyrexia
14% of 7 decks +12% synergy
Getaway Car
12% of 8 decks +12% synergy
Prized Statue
12% of 8 decks +12% synergy
Forethought Amulet
11% of 9 decks +11% synergy
Amulet of Unmaking
11% of 9 decks +11% synergy
Jeweled Torque
11% of 9 decks +11% synergy
Amulet of Kroog
11% of 9 decks +11% synergy
Moonring Mirror
11% of 9 decks +11% synergy
Relic Amulet
11% of 9 decks +11% synergy
Jinxed Ring
11% of 9 decks +11% synergy
Amulet of Safekeeping
11% of 9 decks +11% synergy
Consulate Turret
11% of 9 decks +11% synergy
Avarice Amulet
11% of 9 decks +11% synergy
Glass Casket
11% of 9 decks +11% synergy
Ring of Three Wishes
11% of 9 decks +11% synergy
Prototype Portal
11% of 9 decks +11% synergy
Ring of Evos Isle
11% of 9 decks +11% synergy
Giant's Amulet
11% of 9 decks +11% synergy
Ring of Xathrid
11% of 9 decks +11% synergy
Enchantments
Aether Revolt
100% of 1 decks +99% synergy
One Ring to Rule Them All
50% of 2 decks +48% synergy
Revel in Riches
50% of 2 decks +47% synergy
Retreat to Emeria
33% of 9 decks +33% synergy
Valakut Exploration
33% of 9 decks +31% synergy
Storm the Vault
33% of 9 decks +30% synergy
Court of Vantress
25% of 4 decks +23% synergy
Retreat to Valakut
22% of 9 decks +22% synergy
Era of Innovation
22% of 9 decks +22% synergy
Ghirapur Aether Grid
22% of 9 decks +21% synergy
Mirrodin Besieged
22% of 9 decks +20% synergy
Mechanized Production
22% of 9 decks +20% synergy
Mystic Remora
22% of 9 decks +4% synergy
Smothering Tithe
22% of 9 decks -3% synergy
All Will Be One
17% of 6 decks +13% synergy
Bitter Reunion
14% of 7 decks +13% synergy
Artificer Class
12% of 8 decks +11% synergy
Disappear
11% of 9 decks +11% synergy
Story Circle
11% of 9 decks +11% synergy
Prophetic Ravings
11% of 9 decks +11% synergy
March of the Machines
11% of 9 decks +11% synergy
Trade Routes
11% of 9 decks +11% synergy
Glorious Anthem
11% of 9 decks +10% synergy
Tectonic Reformation
11% of 9 decks +10% synergy
Marshal's Anthem
11% of 9 decks +10% synergy
Oblivion Ring
11% of 9 decks +10% synergy
Fervor
11% of 9 decks +10% synergy
Court of Ire
11% of 9 decks +10% synergy
Court of Cunning
11% of 9 decks +9% synergy
Freed from the Real
11% of 9 decks +9% synergy
Court of Grace
11% of 9 decks +8% synergy
Thopter Spy Network
11% of 9 decks +8% synergy
Fighter Class
11% of 9 decks +7% synergy
Land Tax
11% of 9 decks +4% synergy
Propaganda
11% of 9 decks -0% synergy
Ghostly Prison
11% of 9 decks -0% synergy
Planeswalkers
Saheeli, the Gifted
11% of 9 decks +10% synergy
Karn, the Great Creator
11% of 9 decks +10% synergy
Saheeli Rai
11% of 9 decks +10% synergy
Ugin, the Ineffable
11% of 9 decks +9% synergy
Daretti, Scrap Savant
11% of 9 decks +9% synergy
Tezzeret the Seeker
11% of 9 decks +9% synergy
Utility Lands
Fomori Vault
100% of 2 decks +98% synergy
Vault of Whispers
100% of 2 decks +96% synergy
Oboro, Palace in the Clouds
33% of 9 decks +33% synergy
Inventors' Fair
33% of 9 decks +29% synergy
Buried Ruin
33% of 9 decks +28% synergy
Reliquary Tower
33% of 9 decks +4% synergy
HELIOS One
25% of 4 decks +24% synergy
Guildless Commons
22% of 9 decks +21% synergy
Urza's Saga
22% of 9 decks +15% synergy
Mishra's Workshop
11% of 9 decks +11% synergy
Phyrexia's Core
11% of 9 decks +11% synergy
Throne of the High City
11% of 9 decks +11% synergy
Barbarian Ring
11% of 9 decks +10% synergy
Drownyard Temple
11% of 9 decks +10% synergy
Ghost Quarter
11% of 9 decks +9% synergy
Field of the Dead
11% of 9 decks +8% synergy
Academy Ruins
11% of 9 decks +6% synergy
Urborg, Tomb of Yawgmoth
11% of 9 decks +1% synergy
Ancient Tomb
11% of 9 decks +1% synergy
Mystic Sanctuary
11% of 9 decks -1% synergy
Mana Artifacts
Conversion Apparatus
100% of 1 decks +99% synergy
Arcane Signet
100% of 9 decks +28% synergy
Sol Ring
100% of 9 decks +16% synergy
Talisman of Hierarchy
50% of 2 decks +25% synergy
Talisman of Indulgence
50% of 2 decks +24% synergy
Talisman of Dominance
50% of 2 decks +19% synergy
Boros Signet
44% of 9 decks +21% synergy
Azorius Signet
44% of 9 decks +18% synergy
Izzet Signet
44% of 9 decks +16% synergy
Sonic Screwdriver
25% of 4 decks +24% synergy
Misleading Signpost
25% of 4 decks +23% synergy
Mox Amber
22% of 9 decks +18% synergy
Mox Opal
22% of 9 decks +18% synergy
Mana Vault
22% of 9 decks +16% synergy
Commander's Sphere
22% of 9 decks +7% synergy
Thought Vessel
22% of 9 decks +5% synergy
Fellwar Stone
22% of 9 decks +1% synergy
Talisman of Progress
22% of 9 decks -0% synergy
Talisman of Creativity
22% of 9 decks -7% synergy
The Mightstone and Weakstone
14% of 7 decks +13% synergy
Machine God's Effigy
14% of 7 decks +13% synergy
Jeweled Amulet
11% of 9 decks +11% synergy
Sisay's Ring
11% of 9 decks +11% synergy
Coveted Jewel
11% of 9 decks +10% synergy
Prismatic Lens
11% of 9 decks +10% synergy
Replicating Ring
11% of 9 decks +10% synergy
Grim Monolith
11% of 9 decks +9% synergy
Liquimetal Torque
11% of 9 decks +7% synergy
Marble Diamond
11% of 9 decks +7% synergy
Sky Diamond
11% of 9 decks +6% synergy
Cursed Mirror
11% of 9 decks +6% synergy
Midnight Clock
11% of 9 decks +6% synergy
Fire Diamond
11% of 9 decks +6% synergy
Jeweled Lotus
11% of 9 decks +5% synergy
Chrome Mox
11% of 9 decks +5% synergy
Lotus Petal
11% of 9 decks +4% synergy
Mana Crypt
11% of 9 decks +2% synergy
Chromatic Lantern
11% of 9 decks +2% synergy
Mind Stone
11% of 9 decks -6% synergy
Talisman of Conviction
11% of 9 decks -12% synergy
Lands
Razortide Bridge
67% of 9 decks +60% synergy
Flooded Strand
67% of 9 decks +56% synergy
Scalding Tarn
67% of 9 decks +56% synergy
Command Tower
67% of 9 decks -7% synergy
Rustvale Bridge
56% of 9 decks +50% synergy
Arid Mesa
56% of 9 decks +45% synergy
Steam Vents
56% of 9 decks +16% synergy
Hallowed Fountain
56% of 9 decks +15% synergy
Drossforge Bridge
50% of 2 decks +46% synergy
Mistvault Bridge
50% of 2 decks +45% synergy
Goldmire Bridge
50% of 2 decks +45% synergy
Morphic Pool
50% of 2 decks +24% synergy
Savai Triome
50% of 2 decks +23% synergy
Xander's Lounge
50% of 2 decks +22% synergy
Raffine's Tower
50% of 2 decks +22% synergy
Blood Crypt
50% of 2 decks +11% synergy
Watery Grave
50% of 2 decks +9% synergy
Silverbluff Bridge
44% of 9 decks +38% synergy
Sacred Foundry
44% of 9 decks +8% synergy
Spire of Industry
33% of 9 decks +30% synergy
Azorius Chancery
33% of 9 decks +19% synergy
Boros Garrison
33% of 9 decks +18% synergy
Terramorphic Expanse
33% of 9 decks +18% synergy
Izzet Boilerworks
33% of 9 decks +17% synergy
Evolving Wilds
33% of 9 decks +12% synergy
Public Thoroughfare
25% of 4 decks +25% synergy
Aether Hub
22% of 9 decks +22% synergy
Power Depot
22% of 9 decks +21% synergy
Plateau
22% of 9 decks +10% synergy
Volcanic Island
22% of 9 decks +8% synergy
Myriad Landscape
22% of 9 decks +2% synergy
Glacial Fortress
22% of 9 decks -3% synergy
Training Center
22% of 9 decks -5% synergy
Clifftop Retreat
22% of 9 decks -6% synergy
Sulfur Falls
22% of 9 decks -8% synergy
The Mycosynth Gardens
17% of 6 decks +14% synergy
Obscura Storefront
12% of 8 decks +11% synergy
Maestros Theater
12% of 8 decks +11% synergy
Brokers Hideout
12% of 8 decks +11% synergy
Cabaretti Courtyard
12% of 8 decks +11% synergy
Riveteers Overlook
12% of 8 decks +11% synergy
Gemstone Caverns
11% of 9 decks +6% synergy
Reflecting Pool
11% of 9 decks +6% synergy
Hengegate Pathway
11% of 9 decks +4% synergy
Riverglide Pathway
11% of 9 decks +2% synergy
Fabled Passage
11% of 9 decks +2% synergy
Needleverge Pathway
11% of 9 decks +2% synergy
Bloodstained Mire
11% of 9 decks +1% synergy
Polluted Delta
11% of 9 decks -0% synergy
Marsh Flats
11% of 9 decks -0% synergy