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 c.
  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 w.
  7. Repeat.
Results
Infinite colorless mana. Infinite landfall triggers. Infinite white mana.

Top Commanders (4)
Ishai, Ojutai Dragonspeaker // Toggo, Goblin Weaponsmith
7.69% of 39 decks 3 decks
Bjorna, Nightfall Alchemist // Sophina, Spearsage Deserter
0.61% of 164 decks 1 decks
Dynaheir, Invoker Adept
0.07% of 1443 decks 1 decks
Breya, Etherium Shaper
0.02% of 12341 decks 2 decks
New Cards (2)
Crime Novelist
100% of 1 decks +96% synergy
Fomori Vault
100% of 1 decks +97% synergy
Top Cards (8)
Goblin Engineer
57% of 7 decks +55% synergy
Reckless Fireweaver
57% of 7 decks +55% synergy
Crucible of Worlds
57% of 7 decks +54% synergy
Esper Sentinel
57% of 7 decks +47% synergy
Wayfarer's Bauble
57% of 7 decks +46% synergy
Rhystic Study
57% of 7 decks +43% synergy
Solemn Simulacrum
57% of 7 decks +42% synergy
Swords to Plowshares
57% of 7 decks +29% synergy
Creatures (50)
Jan Jansen, Chaos Crafter
100% of 2 decks +100% synergy
Hell's Caretaker
50% of 2 decks +50% synergy
Marionette Master
50% of 2 decks +48% synergy
Illustrious Wanderglyph
50% of 2 decks +48% synergy
Mayhem Devil
50% of 2 decks +48% synergy
Baleful Strix
50% of 2 decks +47% synergy
Lotho, Corrupt Shirriff
50% of 2 decks +46% synergy
Orcish Bowmasters
50% of 2 decks +43% synergy
Ruin Ghost
43% of 7 decks +43% synergy
Dreamscape Artist
43% of 7 decks +42% synergy
Urza, Lord High Artificer
43% of 7 decks +41% synergy
Sai, Master Thopterist
43% of 7 decks +41% synergy
Emry, Lurker of the Loch
43% of 7 decks +41% synergy
Myr Battlesphere
43% of 7 decks +41% synergy
Myr Retriever
43% of 7 decks +41% synergy
Etherium Sculptor
43% of 7 decks +40% synergy
Foundry Inspector
43% of 7 decks +39% synergy
Burnished Hart
43% of 7 decks +38% synergy
Glóin, Dwarf Emissary
33% of 3 decks +32% synergy
Gandalf the White
33% of 3 decks +32% synergy
Skyswimmer Koi
29% of 7 decks +29% synergy
Tameshi, Reality Architect
29% of 7 decks +28% synergy
Scrapyard Recombiner
29% of 7 decks +28% synergy
Quicksmith Genius
29% of 7 decks +28% synergy
Tunneling Geopede
29% of 7 decks +28% synergy
Hedron Crab
29% of 7 decks +28% synergy
Walking Atlas
29% of 7 decks +28% synergy
Junk Diver
29% of 7 decks +28% synergy
Brudiclad, Telchor Engineer
29% of 7 decks +28% synergy
Master Transmuter
29% of 7 decks +28% synergy
Enthusiastic Mechanaut
29% of 7 decks +28% synergy
Ruin Crab
29% of 7 decks +27% synergy
Teshar, Ancestor's Apostle
29% of 7 decks +27% synergy
Jhoira, Weatherlight Captain
29% of 7 decks +27% synergy
Puresteel Paladin
29% of 7 decks +27% synergy
Weathered Wayfarer
29% of 7 decks +27% synergy
Feldon of the Third Path
29% of 7 decks +27% synergy
Wurmcoil Engine
29% of 7 decks +27% synergy
Scrap Trawler
29% of 7 decks +26% synergy
The Reality Chip
29% of 7 decks +26% synergy
Imperial Recruiter
29% of 7 decks +25% synergy
Sun Titan
29% of 7 decks +23% synergy
Urza, Lord Protector
25% of 4 decks +24% synergy
Urza, Prince of Kroog
25% of 4 decks +24% synergy
Ingenious Artillerist
17% of 6 decks +15% synergy
Professional Face-Breaker
17% of 6 decks +12% synergy
Ringskipper
14% of 7 decks +14% synergy
Valor
14% of 7 decks +14% synergy
Tragic Poet
14% of 7 decks +14% synergy
Tawnos, Urza's Apprentice
14% of 7 decks +14% synergy
Instants (16)
Saw in Half
50% of 2 decks +49% synergy
Dispatch
29% of 7 decks +26% synergy
Muddle the Mixture
29% of 7 decks +26% synergy
Enlightened Tutor
29% of 7 decks +20% synergy
An Offer You Can't Refuse
17% of 6 decks +7% synergy
Dizzy Spell
14% of 7 decks +14% synergy
Second Sunrise
14% of 7 decks +14% synergy
Faith's Reward
14% of 7 decks +14% synergy
Cosmic Intervention
14% of 7 decks +14% synergy
Mana Drain
14% of 7 decks +7% synergy
Mystical Tutor
14% of 7 decks +6% synergy
Arcane Denial
14% of 7 decks +5% synergy
Generous Gift
14% of 7 decks +2% synergy
Cyclonic Rift
14% of 7 decks -0% synergy
Path to Exile
14% of 7 decks -5% synergy
Counterspell
14% of 7 decks -7% synergy
Sorceries (21)
Demonic Tutor
50% of 2 decks +38% synergy
Sevinne's Reclamation
29% of 7 decks +25% synergy
Fabricate
29% of 7 decks +25% synergy
Vandalblast
29% of 7 decks +20% synergy
Jailbreak
17% of 6 decks +17% synergy
Mana Seism
14% of 7 decks +14% synergy
Echo Storm
14% of 7 decks +14% synergy
Saheeli's Directive
14% of 7 decks +14% synergy
Reverse Engineer
14% of 7 decks +14% synergy
Nahiri's Lithoforming
14% of 7 decks +14% synergy
Saheeli's Artistry
14% of 7 decks +14% synergy
Rise and Shine
14% of 7 decks +14% synergy
Reshape
14% of 7 decks +13% synergy
Ondu Inversion
14% of 7 decks +13% synergy
Organic Extinction
14% of 7 decks +13% synergy
Dusk // Dawn
14% of 7 decks +13% synergy
Thoughtcast
14% of 7 decks +13% synergy
Rite of Replication
14% of 7 decks +12% synergy
Idyllic Tutor
14% of 7 decks +12% synergy
Gamble
14% of 7 decks +9% synergy
Faithless Looting
14% of 7 decks +6% synergy
Utility Artifacts (50)
The One Ring
67% of 3 decks +58% synergy
Thopter Foundry
50% of 2 decks +50% synergy
Cranial Plating
50% of 2 decks +49% synergy
Krark-Clan Ironworks
43% of 7 decks +42% synergy
Archaeomancer's Map
43% of 7 decks +41% synergy
Unwinding Clock
43% of 7 decks +40% synergy
Navigation Orb
33% of 6 decks +32% synergy
Seer's Sundial
29% of 7 decks +28% synergy
Mycosynth Lattice
29% of 7 decks +28% synergy
Amulet of Vigor
29% of 7 decks +28% synergy
Altar of the Brood
29% of 7 decks +27% synergy
Darksteel Forge
29% of 7 decks +27% synergy
Cloud Key
29% of 7 decks +27% synergy
Sculpting Steel
29% of 7 decks +26% synergy
Thousand-Year Elixir
29% of 7 decks +26% synergy
Expedition Map
29% of 7 decks +25% synergy
Sword of the Animist
29% of 7 decks +24% synergy
Skullclamp
29% of 7 decks +16% synergy
Portal to Phyrexia
25% of 4 decks +23% synergy
Getaway Car
17% of 6 decks +17% synergy
Prized Statue
17% of 6 decks +16% synergy
Forethought Amulet
14% of 7 decks +14% synergy
Amulet of Unmaking
14% of 7 decks +14% synergy
Jeweled Torque
14% of 7 decks +14% synergy
Amulet of Kroog
14% of 7 decks +14% synergy
Moonring Mirror
14% of 7 decks +14% synergy
Amulet of Safekeeping
14% of 7 decks +14% synergy
Jinxed Ring
14% of 7 decks +14% synergy
Relic Amulet
14% of 7 decks +14% synergy
Avarice Amulet
14% of 7 decks +14% synergy
Wanderer's Twig
14% of 7 decks +14% synergy
Giant's Amulet
14% of 7 decks +14% synergy
Ring of Three Wishes
14% of 7 decks +14% synergy
Soul Foundry
14% of 7 decks +14% synergy
Ring of Evos Isle
14% of 7 decks +14% synergy
Prototype Portal
14% of 7 decks +14% synergy
Ring of Xathrid
14% of 7 decks +14% synergy
Sword of the Meek
14% of 7 decks +14% synergy
Traveler's Amulet
14% of 7 decks +14% synergy
Armillary Sphere
14% of 7 decks +14% synergy
Liquimetal Coating
14% of 7 decks +14% synergy
Wedding Ring
14% of 7 decks +14% synergy
Hammer of Purphoros
14% of 7 decks +14% synergy
Quicksilver Amulet
14% of 7 decks +14% synergy
Mirrorworks
14% of 7 decks +13% synergy
Font of Mythos
14% of 7 decks +13% synergy
Thornbite Staff
14% of 7 decks +13% synergy
Helm of Awakening
14% of 7 decks +13% synergy
Spine of Ish Sah
14% of 7 decks +13% synergy
Mycosynth Wellspring
14% of 7 decks +13% synergy
Enchantments (29)
One Ring to Rule Them All
50% of 2 decks +49% synergy
Court of Vantress
50% of 2 decks +49% synergy
Revel in Riches
50% of 2 decks +48% synergy
Felidar Retreat
43% of 7 decks +40% synergy
Mystic Remora
43% of 7 decks +34% synergy
Retreat to Valakut
29% of 7 decks +29% synergy
Retreat to Emeria
29% of 7 decks +28% synergy
Valakut Exploration
29% of 7 decks +27% synergy
Smothering Tithe
29% of 7 decks +17% synergy
Bitter Reunion
25% of 4 decks +24% synergy
Artificer Class
17% of 6 decks +16% synergy
Disappear
14% of 7 decks +14% synergy
Story Circle
14% of 7 decks +14% synergy
Prophetic Ravings
14% of 7 decks +14% synergy
Trade Routes
14% of 7 decks +14% synergy
Tectonic Reformation
14% of 7 decks +14% synergy
Ghirapur Aether Grid
14% of 7 decks +14% synergy
Oblivion Ring
14% of 7 decks +14% synergy
Court of Ire
14% of 7 decks +14% synergy
Storm the Vault
14% of 7 decks +13% synergy
Fervor
14% of 7 decks +13% synergy
Fighter Class
14% of 7 decks +13% synergy
Court of Cunning
14% of 7 decks +13% synergy
Mirrodin Besieged
14% of 7 decks +13% synergy
Court of Grace
14% of 7 decks +13% synergy
Thopter Spy Network
14% of 7 decks +13% synergy
Land Tax
14% of 7 decks +11% synergy
Propaganda
14% of 7 decks +9% synergy
Ghostly Prison
14% of 7 decks +9% synergy
Planeswalkers (7)
Karn, the Great Creator
29% of 7 decks +27% synergy
Saheeli, the Gifted
14% of 7 decks +14% synergy
Tezzeret, Artifice Master
14% of 7 decks +14% synergy
Saheeli, Sublime Artificer
14% of 7 decks +13% synergy
Tezzeret the Seeker
14% of 7 decks +13% synergy
Daretti, Scrap Savant
14% of 7 decks +13% synergy
Ugin, the Ineffable
14% of 7 decks +12% synergy
Utility Lands (20)
Vault of Whispers
100% of 2 decks +98% synergy
Great Furnace
100% of 7 decks +97% synergy
Seat of the Synod
100% of 7 decks +97% synergy
Treasure Vault
43% of 7 decks +40% synergy
Oboro, Palace in the Clouds
29% of 7 decks +28% synergy
Guildless Commons
29% of 7 decks +27% synergy
Academy Ruins
29% of 7 decks +26% synergy
Buried Ruin
29% of 7 decks +23% synergy
Urza's Saga
29% of 7 decks +21% synergy
Reliquary Tower
29% of 7 decks +0% synergy
Mishra's Workshop
14% of 7 decks +14% synergy
Barbarian Ring
14% of 7 decks +14% synergy
Throne of the High City
14% of 7 decks +14% synergy
Phyrexia's Core
14% of 7 decks +14% synergy
Drownyard Temple
14% of 7 decks +13% synergy
Ghost Quarter
14% of 7 decks +11% synergy
Field of the Dead
14% of 7 decks +11% synergy
Inventors' Fair
14% of 7 decks +10% synergy
Urborg, Tomb of Yawgmoth
14% of 7 decks +4% synergy
Ancient Tomb
14% of 7 decks +3% synergy
Mana Artifacts (32)
Arcane Signet
86% of 7 decks +15% synergy
Sol Ring
86% of 7 decks +1% synergy
Boros Signet
57% of 7 decks +52% synergy
Azorius Signet
57% of 7 decks +51% synergy
Izzet Signet
57% of 7 decks +50% synergy
Talisman of Hierarchy
50% of 2 decks +44% synergy
Talisman of Indulgence
50% of 2 decks +44% synergy
Talisman of Dominance
50% of 2 decks +42% synergy
Replicating Ring
29% of 7 decks +27% synergy
Mana Crypt
29% of 7 decks +17% synergy
Fellwar Stone
29% of 7 decks +8% synergy
Machine God's Effigy
25% of 4 decks +24% synergy
The Mightstone and Weakstone
25% of 4 decks +24% synergy
Jeweled Amulet
14% of 7 decks +14% synergy
Sisay's Ring
14% of 7 decks +14% synergy
Coveted Jewel
14% of 7 decks +13% synergy
Cursed Mirror
14% of 7 decks +12% synergy
Marble Diamond
14% of 7 decks +12% synergy
Sky Diamond
14% of 7 decks +11% synergy
Fire Diamond
14% of 7 decks +11% synergy
Mox Amber
14% of 7 decks +10% synergy
Liquimetal Torque
14% of 7 decks +10% synergy
Talisman of Progress
14% of 7 decks +10% synergy
Mox Opal
14% of 7 decks +10% synergy
Talisman of Conviction
14% of 7 decks +10% synergy
Talisman of Creativity
14% of 7 decks +8% synergy
Lotus Petal
14% of 7 decks +8% synergy
Mana Vault
14% of 7 decks +8% synergy
Jeweled Lotus
14% of 7 decks +7% synergy
Chromatic Lantern
14% of 7 decks +5% synergy
Commander's Sphere
14% of 7 decks -2% synergy
Mind Stone
14% of 7 decks -4% synergy
Lands (44)
Rustvale Bridge
71% of 7 decks +70% synergy
Silverbluff Bridge
71% of 7 decks +70% synergy
Razortide Bridge
71% of 7 decks +70% synergy
Flooded Strand
71% of 7 decks +61% synergy
Arid Mesa
71% of 7 decks +60% synergy
Scalding Tarn
71% of 7 decks +60% synergy
Terramorphic Expanse
57% of 7 decks +41% synergy
Evolving Wilds
57% of 7 decks +35% synergy
Command Tower
57% of 7 decks -16% synergy
Drossforge Bridge
50% of 2 decks +49% synergy
Goldmire Bridge
50% of 2 decks +49% synergy
Mistvault Bridge
50% of 2 decks +49% synergy
Savai Triome
50% of 2 decks +47% synergy
Xander's Lounge
50% of 2 decks +46% synergy
Raffine's Tower
50% of 2 decks +46% synergy
Morphic Pool
50% of 2 decks +43% synergy
Blood Crypt
50% of 2 decks +41% synergy
Godless Shrine
50% of 2 decks +40% synergy
Watery Grave
50% of 2 decks +39% synergy
Sacred Foundry
43% of 7 decks +35% synergy
Steam Vents
43% of 7 decks +34% synergy
Hallowed Fountain
43% of 7 decks +34% synergy
Myriad Landscape
43% of 7 decks +22% synergy
The Mycosynth Gardens
33% of 3 decks +30% synergy
Power Depot
29% of 7 decks +28% synergy
Azorius Chancery
29% of 7 decks +25% synergy
Boros Garrison
29% of 7 decks +25% synergy
Izzet Boilerworks
29% of 7 decks +25% synergy
Obscura Storefront
17% of 6 decks +15% synergy
Brokers Hideout
17% of 6 decks +15% synergy
Maestros Theater
17% of 6 decks +15% synergy
Cabaretti Courtyard
17% of 6 decks +15% synergy
Riveteers Overlook
17% of 6 decks +15% synergy
Plateau
14% of 7 decks +11% synergy
Spire of Industry
14% of 7 decks +11% synergy
Tundra
14% of 7 decks +11% synergy
Raugrin Triome
14% of 7 decks +11% synergy
Volcanic Island
14% of 7 decks +11% synergy
Gemstone Caverns
14% of 7 decks +10% synergy
Reflecting Pool
14% of 7 decks +9% synergy
Training Center
14% of 7 decks +8% synergy
Bloodstained Mire
14% of 7 decks +4% synergy
Polluted Delta
14% of 7 decks +3% synergy
Marsh Flats
14% of 7 decks +2% synergy