Goblin Welder
Retreat to Coralhelm
Darksteel Citadel
Ancient Den
1

   Prerequisites

What do I need to start this combo?
Darksteel Citadel in your graveyard.
All other permanents on the battlefield.
Goblin Welder does not have summoning sickness.

   Steps

How does this combo work?
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

What do I get from this combo?
Infinite colorless mana
Infinite landfall triggers
Infinite white mana
Breya, Etherium Shaper
0.03% of 15494 decks 4 decks
Dr. Madison Li
0.05% of 5460 decks 3 decks
Ishai, Ojutai Dragonspeaker // Toggo, Goblin Weaponsmith
8.82% of 34 decks 3 decks
Bjorna, Nightfall Alchemist // Sophina, Spearsage Deserter
0.64% of 157 decks 1 decks
Liberty Prime, Recharged
0.03% of 3960 decks 1 decks
High Synergy Cards
Vault of Whispers
100% of 4 decks +96% synergy
Great Furnace
100% of 12 decks +95% synergy
Seat of the Synod
100% of 12 decks +94% synergy
Etherium Sculptor
58% of 12 decks +53% synergy
Unwinding Clock
50% of 12 decks +47% synergy
Esper Sentinel
67% of 12 decks +47% synergy
Inventors' Fair
50% of 12 decks +46% synergy
Foundry Inspector
50% of 12 decks +46% synergy
Reckless Fireweaver
50% of 12 decks +46% synergy
Dispatch
50% of 12 decks +45% synergy
Top Cards
Jhoira, Weatherlight Captain
50% of 12 decks +44% synergy
Krark-Clan Ironworks
42% of 12 decks +41% synergy
Goblin Engineer
42% of 12 decks +39% synergy
Solemn Simulacrum
42% of 12 decks +28% synergy
An Offer You Can't Refuse
42% of 12 decks +20% synergy
Electrostatic Pummeler
33% of 12 decks +33% synergy
Ruin Ghost
33% of 12 decks +33% synergy
Wurmcoil Engine
33% of 12 decks +32% synergy
Cloud Key
33% of 12 decks +32% synergy
Sculpting Steel
33% of 12 decks +31% synergy
Game Changers
Cyclonic Rift
50% of 12 decks +24% synergy
Urza, Lord High Artificer
33% of 12 decks +30% synergy
Mana Vault
33% of 12 decks +27% synergy
Enlightened Tutor
25% of 12 decks +8% synergy
Rhystic Study
25% of 12 decks -1% synergy
Creatures
Guide of Souls
33% of 9 decks +31% synergy
Thought Monitor
33% of 12 decks +30% synergy
Sai, Master Thopterist
33% of 12 decks +30% synergy
Enthusiastic Mechanaut
33% of 12 decks +29% synergy
Aethergeode Miner
25% of 12 decks +25% synergy
Trove Warden
25% of 12 decks +25% synergy
Walking Atlas
25% of 12 decks +24% synergy
Dreamscape Artist
25% of 12 decks +24% synergy
Whirler Virtuoso
25% of 12 decks +24% synergy
Master Transmuter
25% of 12 decks +24% synergy
Myr Retriever
25% of 12 decks +23% synergy
Myr Battlesphere
25% of 12 decks +23% synergy
Shimmer Dragon
25% of 12 decks +23% synergy
Teshar, Ancestor's Apostle
25% of 12 decks +23% synergy
Kappa Cannoneer
25% of 12 decks +23% synergy
Puresteel Paladin
25% of 12 decks +21% synergy
Emry, Lurker of the Loch
25% of 12 decks +21% synergy
Imperial Recruiter
25% of 12 decks +20% synergy
Phyrexian Metamorph
25% of 12 decks +18% synergy
Instants
Galvanic Discharge
33% of 9 decks +33% synergy
Path to Exile
33% of 12 decks -13% synergy
Swords to Plowshares
33% of 12 decks -29% synergy
Mana Drain
25% of 12 decks +10% synergy
Sorceries
Jolted Awake
33% of 9 decks +33% synergy
Fabricate
25% of 12 decks +19% synergy
Utility Artifacts
Aether Refinery
33% of 9 decks +33% synergy
Unstable Amulet
33% of 9 decks +32% synergy
Panharmonicon
33% of 12 decks +29% synergy
Wayfarer's Bauble
33% of 12 decks +24% synergy
Automated Assembly Line
30% of 10 decks +29% synergy
Decoction Module
25% of 12 decks +25% synergy
Gonti's Aether Heart
25% of 12 decks +25% synergy
Amulet of Vigor
25% of 12 decks +24% synergy
Mishra's Bauble
25% of 12 decks +24% synergy
Ichor Wellspring
25% of 12 decks +23% synergy
Shorikai, Genesis Engine
25% of 12 decks +22% synergy
Archaeomancer's Map
25% of 12 decks +22% synergy
Sensei's Divining Top
25% of 12 decks +20% synergy
Skullclamp
25% of 12 decks +13% synergy
Enchantments
Storm the Vault
33% of 12 decks +30% synergy
Retreat to Emeria
25% of 12 decks +24% synergy
Mechanized Production
25% of 12 decks +22% synergy
Felidar Retreat
25% of 12 decks +18% synergy
Planeswalkers
Daretti, Scrap Savant
25% of 12 decks +23% synergy
Utility Lands
Treasure Vault
42% of 12 decks +39% synergy
Fomori Vault
40% of 10 decks +39% synergy
Reliquary Tower
33% of 12 decks +4% synergy
Buried Ruin
25% of 12 decks +20% synergy
Academy Ruins
25% of 12 decks +20% synergy
Urza's Saga
25% of 12 decks +18% synergy
Mana Artifacts
Sol Ring
100% of 12 decks +16% synergy
Arcane Signet
83% of 12 decks +11% synergy
Talisman of Creativity
33% of 12 decks +5% synergy
Thought Vessel
25% of 12 decks +8% synergy
Fellwar Stone
25% of 12 decks +4% synergy
Boros Signet
25% of 12 decks +3% synergy
Talisman of Progress
25% of 12 decks +1% synergy
Azorius Signet
25% of 12 decks -0% synergy
Izzet Signet
25% of 12 decks -2% synergy
Lands
Command Tower
83% of 12 decks +9% synergy
Hallowed Fountain
67% of 12 decks +27% synergy
Razortide Bridge
58% of 12 decks +52% synergy
Flooded Strand
58% of 12 decks +47% synergy
Sacred Foundry
58% of 12 decks +23% synergy
Steam Vents
58% of 12 decks +20% synergy
Rustvale Bridge
50% of 12 decks +45% synergy
Scalding Tarn
50% of 12 decks +39% synergy
Arid Mesa
42% of 12 decks +31% synergy
Aether Hub
33% of 12 decks +33% synergy
Spire of Industry
33% of 12 decks +30% synergy
Silverbluff Bridge
33% of 12 decks +28% synergy
Power Depot
25% of 12 decks +24% synergy
Boros Garrison
25% of 12 decks +11% synergy
Azorius Chancery
25% of 12 decks +11% synergy
Raugrin Triome
25% of 12 decks -1% synergy
Sea of Clouds
25% of 12 decks -1% synergy
Training Center
25% of 12 decks -2% synergy
Glacial Fortress
25% of 12 decks -3% synergy
Clifftop Retreat
25% of 12 decks -6% synergy
Sulfur Falls
25% of 12 decks -7% synergy
Exotic Orchard
25% of 12 decks -11% synergy