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
0.02% of 13893 decks 3 decks
Dr. Madison Li
0.02% of 4108 decks 1 decks
Bjorna, Nightfall Alchemist // Sophina, Spearsage Deserter
0.64% of 157 decks 1 decks
Liberty Prime, Recharged
0.03% of 2996 decks 1 decks
High Synergy Cards
Great Furnace
100% of 10 decks +94% synergy
Seat of the Synod
100% of 10 decks +94% synergy
Ruin Ghost
50% of 10 decks +50% synergy
Esper Sentinel
70% of 10 decks +49% synergy
Treasure Vault
50% of 10 decks +47% synergy
Foundry Inspector
50% of 10 decks +46% synergy
Reckless Fireweaver
50% of 10 decks +46% synergy
Etherium Sculptor
50% of 10 decks +44% synergy
Wayfarer's Bauble
50% of 10 decks +40% synergy
Walking Atlas
40% of 10 decks +39% synergy
Top Cards
Swords to Plowshares
50% of 10 decks -13% synergy
An Offer You Can't Refuse
44% of 9 decks +24% synergy
Dreamscape Artist
40% of 10 decks +39% synergy
Retreat to Emeria
40% of 10 decks +39% synergy
Krark-Clan Ironworks
40% of 10 decks +39% synergy
Unwinding Clock
40% of 10 decks +37% synergy
Urza, Lord High Artificer
40% of 10 decks +37% synergy
Goblin Engineer
40% of 10 decks +37% synergy
Puresteel Paladin
40% of 10 decks +36% synergy
Dispatch
40% of 10 decks +35% synergy
Creatures
Imskir Iron-Eater
50% of 2 decks +49% synergy
Sphinx of the Revelation
50% of 2 decks +47% synergy
Guide of Souls
50% of 2 decks +46% synergy
Marionette Apprentice
50% of 2 decks +42% synergy
Rex, Cyber-Hound
40% of 5 decks +39% synergy
Solemn Simulacrum
40% of 10 decks +26% synergy
Glaze Fiend
33% of 3 decks +33% synergy
Charforger
33% of 3 decks +33% synergy
Hell's Caretaker
33% of 3 decks +33% synergy
Contraband Kingpin
33% of 3 decks +33% synergy
Dimir House Guard
33% of 3 decks +33% synergy
Garna, the Bloodflame
33% of 3 decks +32% synergy
Roil Cartographer
33% of 3 decks +32% synergy
Dimir Infiltrator
33% of 3 decks +32% synergy
Urza, Chief Artificer
33% of 3 decks +31% synergy
Jan Jansen, Chaos Crafter
33% of 3 decks +30% synergy
Marionette Master
33% of 3 decks +30% synergy
Orcish Bowmasters
33% of 3 decks +22% synergy
Lotho, Corrupt Shirriff
33% of 3 decks +19% synergy
Trove Warden
30% of 10 decks +30% synergy
Quicksmith Genius
30% of 10 decks +29% synergy
Myr Retriever
30% of 10 decks +28% synergy
Shimmer Dragon
30% of 10 decks +28% synergy
Teshar, Ancestor's Apostle
30% of 10 decks +28% synergy
Thought Monitor
30% of 10 decks +27% synergy
Sai, Master Thopterist
30% of 10 decks +26% synergy
Enthusiastic Mechanaut
30% of 10 decks +26% synergy
Burnished Hart
30% of 10 decks +26% synergy
Imperial Recruiter
30% of 10 decks +24% synergy
Jhoira, Weatherlight Captain
30% of 10 decks +24% synergy
Electrostatic Pummeler
20% of 10 decks +20% synergy
Sage of Lat-Nam
20% of 10 decks +20% synergy
Aethergeode Miner
20% of 10 decks +20% synergy
Scrapyard Recombiner
20% of 10 decks +20% synergy
Scaretiller
20% of 10 decks +20% synergy
Kemba, Kha Regent
20% of 10 decks +20% synergy
Tameshi, Reality Architect
20% of 10 decks +19% synergy
Junk Diver
20% of 10 decks +19% synergy
Spitfire Lagac
20% of 10 decks +19% synergy
Tunneling Geopede
20% of 10 decks +19% synergy
Assaultron Dominator
20% of 5 decks +19% synergy
Cyberman Patrol
20% of 5 decks +19% synergy
Brotherhood Scribe
20% of 5 decks +19% synergy
Gleaming Geardrake
20% of 5 decks +19% synergy
Cybermen Squadron
20% of 5 decks +19% synergy
Hedron Crab
20% of 10 decks +19% synergy
Glóin, Dwarf Emissary
20% of 5 decks +18% synergy
Master Transmuter
20% of 10 decks +18% synergy
Oswald Fiddlebender
20% of 10 decks +18% synergy
Wurmcoil Engine
20% of 10 decks +18% synergy
Instants
Enlightened Tutor
40% of 10 decks +22% synergy
Cyclonic Rift
40% of 10 decks +12% synergy
Shred Memory
33% of 3 decks +33% synergy
Galvanic Discharge
33% of 3 decks +32% synergy
Tune the Narrative
33% of 3 decks +32% synergy
Perplex
33% of 3 decks +32% synergy
Rush of Inspiration
33% of 3 decks +31% synergy
Countersquall
33% of 3 decks +31% synergy
Saw in Half
33% of 3 decks +30% synergy
Muddle the Mixture
30% of 10 decks +25% synergy
Dizzy Spell
20% of 10 decks +20% synergy
Mana Drain
20% of 10 decks +5% synergy
Path to Exile
20% of 10 decks -26% synergy
Exclude
10% of 10 decks +10% synergy
Second Sunrise
10% of 10 decks +10% synergy
Glimmer of Genius
10% of 10 decks +10% synergy
Faith's Reward
10% of 10 decks +9% synergy
Cosmic Intervention
10% of 10 decks +9% synergy
Aetherspouts
10% of 10 decks +8% synergy
Kabira Takedown
10% of 10 decks +8% synergy
Sejiri Shelter
10% of 10 decks +7% synergy
Aetherize
10% of 10 decks +4% synergy
Silence
10% of 10 decks +4% synergy
Force of Negation
10% of 10 decks +1% synergy
Force of Will
10% of 10 decks -1% synergy
Mystical Tutor
10% of 10 decks -5% synergy
Swan Song
10% of 10 decks -7% synergy
Fierce Guardianship
10% of 10 decks -8% synergy
Arcane Denial
10% of 10 decks -10% synergy
Brainstorm
10% of 10 decks -11% synergy
Negate
10% of 10 decks -13% synergy
Generous Gift
10% of 10 decks -16% synergy
Counterspell
10% of 10 decks -33% synergy
Sorceries
Season of Weaving
100% of 1 decks +96% synergy
Reiterating Bolt
50% of 2 decks +50% synergy
Localized Destruction
50% of 2 decks +49% synergy
Jolted Awake
50% of 2 decks +49% synergy
Painful Truths
33% of 3 decks +30% synergy
Read the Bones
33% of 3 decks +26% synergy
Demonic Tutor
33% of 3 decks +11% synergy
Sevinne's Reclamation
30% of 10 decks +23% synergy
Nahiri's Lithoforming
20% of 10 decks +19% synergy
Rise and Shine
20% of 10 decks +19% synergy
Thoughtcast
20% of 10 decks +17% synergy
Sea Gate Restoration
20% of 10 decks +15% synergy
Idyllic Tutor
20% of 10 decks +15% synergy
Fabricate
20% of 10 decks +14% synergy
Vandalblast
20% of 10 decks +4% synergy
Recommission
12% of 8 decks +12% synergy
Jailbreak
11% of 9 decks +11% synergy
Irenicus's Vile Duplication
11% of 9 decks +8% synergy
Mana Seism
10% of 10 decks +10% synergy
Planar Birth
10% of 10 decks +10% synergy
Saheeli's Directive
10% of 10 decks +10% synergy
Reverse Engineer
10% of 10 decks +9% synergy
Insult // Injury
10% of 10 decks +9% synergy
Trash for Treasure
10% of 10 decks +9% synergy
Open the Vaults
10% of 10 decks +9% synergy
Slaughter the Strong
10% of 10 decks +9% synergy
Expropriate
10% of 10 decks +8% synergy
Ondu Inversion
10% of 10 decks +8% synergy
Organic Extinction
10% of 10 decks +7% synergy
Wake the Past
10% of 10 decks +7% synergy
Dusk // Dawn
10% of 10 decks +6% synergy
Grapeshot
10% of 10 decks +6% synergy
Gamble
10% of 10 decks +0% synergy
Ponder
10% of 10 decks -3% synergy
Farewell
10% of 10 decks -3% synergy
Faithless Looting
10% of 10 decks -7% synergy
Utility Artifacts
Cranial Ram
50% of 2 decks +48% synergy
Aether Refinery
33% of 3 decks +32% synergy
Unstable Amulet
33% of 3 decks +32% synergy
Cranial Plating
33% of 3 decks +31% synergy
Thopter Foundry
33% of 3 decks +31% synergy
Izzet Generatorium
33% of 3 decks +31% synergy
Amulet of Vigor
30% of 10 decks +29% synergy
Mishra's Bauble
30% of 10 decks +29% synergy
Cloud Key
30% of 10 decks +28% synergy
Crucible of Worlds
30% of 10 decks +27% synergy
Archaeomancer's Map
30% of 10 decks +26% synergy
Panharmonicon
30% of 10 decks +26% synergy
Encroaching Mycosynth
29% of 7 decks +27% synergy
The One Ring
29% of 7 decks +20% synergy
Navigation Orb
22% of 9 decks +22% synergy
Decoction Module
20% of 10 decks +20% synergy
Gonti's Aether Heart
20% of 10 decks +20% synergy
Plasma Caster
20% of 5 decks +19% synergy
Automated Assembly Line
20% of 5 decks +19% synergy
Altar of the Brood
20% of 10 decks +19% synergy
Hammer of Purphoros
20% of 10 decks +19% synergy
Moonsilver Key
20% of 10 decks +19% synergy
Ichor Wellspring
20% of 10 decks +18% synergy
Inspiring Statuary
20% of 10 decks +18% synergy
Worldwalker Helm
20% of 5 decks +18% synergy
Simulacrum Synthesizer
20% of 5 decks +18% synergy
Sculpting Steel
20% of 10 decks +18% synergy
Mystic Forge
20% of 10 decks +17% synergy
Expedition Map
20% of 10 decks +17% synergy
Sword of the Animist
20% of 10 decks +15% synergy
Skullclamp
20% of 10 decks +8% synergy
Bladehold War-Whip
14% of 7 decks +12% synergy
Portal to Phyrexia
12% of 8 decks +11% synergy
Getaway Car
11% of 9 decks +11% synergy
Prized Statue
11% of 9 decks +10% synergy
Forethought Amulet
10% of 10 decks +10% synergy
Jeweled Torque
10% of 10 decks +10% synergy
Amulet of Unmaking
10% of 10 decks +10% synergy
Amulet of Kroog
10% of 10 decks +10% synergy
Moonring Mirror
10% of 10 decks +10% synergy
Relic Amulet
10% of 10 decks +10% synergy
Jinxed Ring
10% of 10 decks +10% synergy
Amulet of Safekeeping
10% of 10 decks +10% synergy
Consulate Turret
10% of 10 decks +10% synergy
Avarice Amulet
10% of 10 decks +10% synergy
Glass Casket
10% of 10 decks +10% synergy
Ring of Three Wishes
10% of 10 decks +10% synergy
Prototype Portal
10% of 10 decks +10% synergy
Ring of Evos Isle
10% of 10 decks +10% synergy
Giant's Amulet
10% of 10 decks +10% synergy
Enchantments
Aether Revolt
50% of 2 decks +49% synergy
Felidar Retreat
40% of 10 decks +33% synergy
Rhystic Study
40% of 10 decks +12% synergy
Underhanded Designs
33% of 3 decks +33% synergy
Retreat to Hagra
33% of 3 decks +32% synergy
One Ring to Rule Them All
33% of 3 decks +31% synergy
Revel in Riches
33% of 3 decks +30% synergy
Valakut Exploration
30% of 10 decks +28% synergy
Storm the Vault
30% of 10 decks +27% synergy
Retreat to Valakut
20% of 10 decks +20% synergy
Era of Innovation
20% of 10 decks +20% synergy
Ghirapur Aether Grid
20% of 10 decks +19% synergy
Mirrodin Besieged
20% of 10 decks +18% synergy
Court of Vantress
20% of 5 decks +18% synergy
Mechanized Production
20% of 10 decks +17% synergy
Land Tax
20% of 10 decks +13% synergy
Mystic Remora
20% of 10 decks +2% synergy
Smothering Tithe
20% of 10 decks -5% synergy
All Will Be One
14% of 7 decks +11% synergy
Bitter Reunion
12% of 8 decks +11% synergy
Artificer Class
11% of 9 decks +10% synergy
Disappear
10% of 10 decks +10% synergy
Story Circle
10% of 10 decks +10% synergy
March of the Machines
10% of 10 decks +10% synergy
Trade Routes
10% of 10 decks +9% synergy
Pia's Revolution
10% of 10 decks +9% synergy
Glorious Anthem
10% of 10 decks +9% synergy
Tectonic Reformation
10% of 10 decks +9% synergy
Marshal's Anthem
10% of 10 decks +9% synergy
Oblivion Ring
10% of 10 decks +9% synergy
Fervor
10% of 10 decks +9% synergy
Court of Ire
10% of 10 decks +9% synergy
Court of Cunning
10% of 10 decks +8% synergy
Freed from the Real
10% of 10 decks +8% synergy
Court of Grace
10% of 10 decks +7% synergy
Thopter Spy Network
10% of 10 decks +7% synergy
Fighter Class
10% of 10 decks +6% synergy
Ghostly Prison
10% of 10 decks -2% synergy
Propaganda
10% of 10 decks -2% synergy
Planeswalkers
Dakkon, Shadow Slayer
33% of 3 decks +32% synergy
Daretti, Scrap Savant
20% of 10 decks +18% synergy
Saheeli, the Gifted
10% of 10 decks +9% synergy
Karn, the Great Creator
10% of 10 decks +9% synergy
Saheeli Rai
10% of 10 decks +9% synergy
Ugin, the Ineffable
10% of 10 decks +8% synergy
Tezzeret the Seeker
10% of 10 decks +7% synergy
Utility Lands
Vault of Whispers
100% of 3 decks +96% synergy
Fomori Vault
67% of 3 decks +65% synergy
Oboro, Palace in the Clouds
30% of 10 decks +29% synergy
Inventors' Fair
30% of 10 decks +26% synergy
Buried Ruin
30% of 10 decks +25% synergy
Reliquary Tower
30% of 10 decks +0% synergy
HELIOS One
20% of 5 decks +19% synergy
Guildless Commons
20% of 10 decks +19% synergy
Urza's Saga
20% of 10 decks +13% synergy
Mishra's Workshop
10% of 10 decks +10% synergy
Phyrexia's Core
10% of 10 decks +10% synergy
Throne of the High City
10% of 10 decks +10% synergy
Barbarian Ring
10% of 10 decks +9% synergy
Drownyard Temple
10% of 10 decks +9% synergy
Mishra's Factory
10% of 10 decks +9% synergy
Ghost Quarter
10% of 10 decks +8% synergy
Field of the Dead
10% of 10 decks +7% synergy
Academy Ruins
10% of 10 decks +5% synergy
Urborg, Tomb of Yawgmoth
10% of 10 decks +0% synergy
Ancient Tomb
10% of 10 decks -0% synergy
Mystic Sanctuary
10% of 10 decks -2% synergy
Mana Artifacts
Sol Ring
100% of 10 decks +16% synergy
Arcane Signet
90% of 10 decks +18% synergy
Conversion Apparatus
50% of 2 decks +49% synergy
Boros Signet
40% of 10 decks +16% synergy
Azorius Signet
40% of 10 decks +14% synergy
Izzet Signet
40% of 10 decks +12% synergy
Talisman of Hierarchy
33% of 3 decks +9% synergy
Talisman of Indulgence
33% of 3 decks +7% synergy
Orzhov Signet
33% of 3 decks +6% synergy
Dimir Signet
33% of 3 decks +4% synergy
Rakdos Signet
33% of 3 decks +4% synergy
Talisman of Dominance
33% of 3 decks +2% synergy
Sonic Screwdriver
20% of 5 decks +19% synergy
Misleading Signpost
20% of 5 decks +18% synergy
Mox Amber
20% of 10 decks +16% synergy
Mox Opal
20% of 10 decks +16% synergy
Mana Vault
20% of 10 decks +14% synergy
Chromatic Lantern
20% of 10 decks +10% synergy
Commander's Sphere
20% of 10 decks +5% synergy
Thought Vessel
20% of 10 decks +3% synergy
Fellwar Stone
20% of 10 decks -1% synergy
Talisman of Progress
20% of 10 decks -3% synergy
Talisman of Creativity
20% of 10 decks -9% synergy
The Mightstone and Weakstone
12% of 8 decks +12% synergy
Machine God's Effigy
12% of 8 decks +11% synergy
Jeweled Amulet
10% of 10 decks +10% synergy
Sisay's Ring
10% of 10 decks +10% synergy
Coveted Jewel
10% of 10 decks +9% synergy
Prismatic Lens
10% of 10 decks +9% synergy
Replicating Ring
10% of 10 decks +9% synergy
Grim Monolith
10% of 10 decks +8% synergy
Liquimetal Torque
10% of 10 decks +6% synergy
Marble Diamond
10% of 10 decks +6% synergy
Sky Diamond
10% of 10 decks +5% synergy
Cursed Mirror
10% of 10 decks +5% synergy
Midnight Clock
10% of 10 decks +5% synergy
Fire Diamond
10% of 10 decks +5% synergy
Jeweled Lotus
10% of 10 decks +4% synergy
Chrome Mox
10% of 10 decks +4% synergy
Lotus Petal
10% of 10 decks +3% synergy
Mana Crypt
10% of 10 decks +1% synergy
Mind Stone
10% of 10 decks -7% synergy
Talisman of Conviction
10% of 10 decks -13% synergy
Lands
Razortide Bridge
70% of 10 decks +63% synergy
Command Tower
70% of 10 decks -4% synergy
Drossforge Bridge
67% of 3 decks +62% synergy
Mistvault Bridge
67% of 3 decks +62% synergy
Goldmire Bridge
67% of 3 decks +62% synergy
Rustvale Bridge
60% of 10 decks +55% synergy
Flooded Strand
60% of 10 decks +49% synergy
Scalding Tarn
60% of 10 decks +49% synergy
Horizon of Progress
50% of 2 decks +48% synergy
Arid Mesa
50% of 10 decks +39% synergy
Steam Vents
50% of 10 decks +11% synergy
Hallowed Fountain
50% of 10 decks +9% synergy
Silverbluff Bridge
40% of 10 decks +34% synergy
Sacred Foundry
40% of 10 decks +4% synergy
Morphic Pool
33% of 3 decks +7% synergy
Savai Triome
33% of 3 decks +6% synergy
Xander's Lounge
33% of 3 decks +6% synergy
Raffine's Tower
33% of 3 decks +6% synergy
Blood Crypt
33% of 3 decks -5% synergy
Watery Grave
33% of 3 decks -7% synergy
Power Depot
30% of 10 decks +29% synergy
Spire of Industry
30% of 10 decks +27% synergy
Azorius Chancery
30% of 10 decks +15% synergy
Boros Garrison
30% of 10 decks +15% synergy
Terramorphic Expanse
30% of 10 decks +14% synergy
Izzet Boilerworks
30% of 10 decks +14% synergy
Evolving Wilds
30% of 10 decks +9% synergy
Public Thoroughfare
20% of 5 decks +20% synergy
Aether Hub
20% of 10 decks +20% synergy
Scene of the Crime
20% of 5 decks +19% synergy
Promising Vein
20% of 5 decks +19% synergy
Plateau
20% of 10 decks +8% synergy
Volcanic Island
20% of 10 decks +6% synergy
Myriad Landscape
20% of 10 decks +0% synergy
Glacial Fortress
20% of 10 decks -6% synergy
Training Center
20% of 10 decks -8% synergy
Clifftop Retreat
20% of 10 decks -8% synergy
Sulfur Falls
20% of 10 decks -11% synergy
The Mycosynth Gardens
14% of 7 decks +12% synergy
Obscura Storefront
11% of 9 decks +10% synergy
Maestros Theater
11% of 9 decks +10% synergy
Brokers Hideout
11% of 9 decks +10% synergy
Cabaretti Courtyard
11% of 9 decks +9% synergy
Ash Barrens
10% of 10 decks +5% synergy
Gemstone Caverns
10% of 10 decks +5% synergy
Reflecting Pool
10% of 10 decks +5% synergy
Hengegate Pathway
10% of 10 decks +2% synergy
Riverglide Pathway
10% of 10 decks +1% synergy
Fabled Passage
10% of 10 decks +1% synergy
Needleverge Pathway
10% of 10 decks +1% synergy