Goblin Welder + Retreat to Coralhelm + Darksteel Citadel + Great Furnace

Goblin Welder
Retreat to Coralhelm
Darksteel Citadel
Great Furnace

Requires
Goblin Welder must be on the battlefield. Retreat to Coralhelm must be on the battlefield. Darksteel Citadel must be in the graveyard. Great Furnace must be on the battlefield.
Steps
  1. Activate Goblin Welder by tapping it, causing you to sacrifice Great Furnace 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 Great Furnace from your graveyard to the battlefield.
  5. Great Furnace enters the battlefield, triggering Retreat to Coralhelm, untapping Goblin Welder.
  6. Activate Great Furnace by tapping it, adding .
  7. Repeat.
Results
Infinite colorless mana. Infinite landfall triggers. Infinite red mana.

Jhoira, Ageless Innovator
0.99% of 2131 decks 21 decks
Saheeli, the Sun's Brilliance
0.67% of 1802 decks 12 decks
Sakashima of a Thousand Faces // Toggo, Goblin Weaponsmith
3.14% of 159 decks 5 decks
Glacian, Powerstone Engineer // Toggo, Goblin Weaponsmith
3.74% of 107 decks 4 decks
Breya, Etherium Shaper
0.03% of 15330 decks 4 decks
Ashnod the Uncaring
0.16% of 2473 decks 4 decks
Dr. Madison Li
0.06% of 5376 decks 3 decks
Iron Man, Titan of Innovation
0.06% of 4826 decks 3 decks
Ishai, Ojutai Dragonspeaker // Toggo, Goblin Weaponsmith
8.82% of 34 decks 3 decks
Silas Renn, Seeker Adept // Toggo, Goblin Weaponsmith
0.87% of 230 decks 2 decks
Brudiclad, Telchor Engineer
0.02% of 5332 decks 1 decks
Ludevic, Necro-Alchemist // Toggo, Goblin Weaponsmith
12.50% of 8 decks 1 decks
Thrasios, Triton Hero // Toggo, Goblin Weaponsmith
0.13% of 754 decks 1 decks
Bjorna, Nightfall Alchemist // Sophina, Spearsage Deserter
0.62% of 160 decks 1 decks
Liberty Prime, Recharged
0.03% of 3883 decks 1 decks
Ian Malcolm, Chaotician
0.03% of 3245 decks 1 decks
Kydele, Chosen of Kruphix // Toggo, Goblin Weaponsmith
1.03% of 97 decks 1 decks
Rashmi and Ragavan
0.02% of 5854 decks 1 decks
New Cards
Transit Mage
29% of 21 decks +28% synergy
Riverpyre Verge
5% of 21 decks -1% synergy
Stridehangar Automaton
5% of 21 decks +4% synergy
Repurposing Bay
5% of 21 decks +3% synergy
Radiant Lotus
5% of 21 decks +4% synergy
High Synergy Cards
Vault of Whispers
100% of 11 decks +96% synergy
Ancient Den
100% of 12 decks +95% synergy
Seat of the Synod
99% of 70 decks +92% synergy
Master Transmuter
53% of 70 decks +51% synergy
Solemn Simulacrum
63% of 70 decks +49% synergy
Goblin Engineer
51% of 70 decks +48% synergy
Esper Sentinel
67% of 12 decks +47% synergy
Buried Ruin
51% of 70 decks +47% synergy
Reckless Fireweaver
50% of 70 decks +46% synergy
Thought Monitor
49% of 70 decks +45% synergy
Top Cards
Dispatch
50% of 12 decks +45% synergy
Etherium Sculptor
50% of 70 decks +45% synergy
Counterspell
50% of 70 decks +8% synergy
Blasphemous Act
49% of 70 decks +15% synergy
Emry, Lurker of the Loch
46% of 70 decks +42% synergy
Enthusiastic Mechanaut
44% of 70 decks +40% synergy
Foundry Inspector
41% of 70 decks +37% synergy
Jhoira, Weatherlight Captain
41% of 70 decks +36% synergy
Unwinding Clock
39% of 70 decks +36% synergy
Kappa Cannoneer
37% of 70 decks +35% synergy
Game Changers
Urza, Lord High Artificer
33% of 70 decks +30% synergy
Bolas's Citadel
27% of 11 decks +19% synergy
Cyclonic Rift
26% of 70 decks -1% synergy
Enlightened Tutor
25% of 12 decks +8% synergy
Rhystic Study
23% of 70 decks -4% synergy
Fierce Guardianship
14% of 70 decks -4% synergy
Mana Vault
10% of 70 decks +4% synergy
The One Ring
10% of 70 decks +2% synergy
Ancient Tomb
10% of 70 decks -0% synergy
Mystical Tutor
7% of 70 decks -7% synergy
Creatures
Tireless Provisioner
100% of 3 decks +89% synergy
Ruin Ghost
33% of 12 decks +33% synergy
Guide of Souls
33% of 9 decks +31% synergy
Sai, Master Thopterist
33% of 70 decks +29% synergy
Walking Atlas
31% of 70 decks +31% synergy
Scrap Trawler
31% of 70 decks +30% synergy
Myr Battlesphere
31% of 70 decks +30% synergy
Padeem, Consul of Innovation
31% of 70 decks +28% synergy
Myr Retriever
30% of 70 decks +28% synergy
Cyberdrive Awakener
29% of 70 decks +26% synergy
Ob Nixilis, the Fallen
27% of 11 decks +26% synergy
Marionette Master
27% of 11 decks +24% synergy
Wurmcoil Engine
27% of 70 decks +25% synergy
Brudiclad, Telchor Engineer
27% of 70 decks +23% synergy
Marvin, Murderous Mimic
26% of 35 decks +24% synergy
Aethergeode Miner
25% of 12 decks +25% synergy
Trove Warden
25% of 12 decks +25% synergy
Teshar, Ancestor's Apostle
25% of 12 decks +23% synergy
Puresteel Paladin
25% of 12 decks +21% synergy
Phyrexian Metamorph
24% of 70 decks +17% synergy
Kuldotha Forgemaster
23% of 70 decks +22% synergy
Ingenious Artillerist
23% of 70 decks +21% synergy
Corridor Monitor
21% of 70 decks +21% synergy
Shimmer Dragon
21% of 70 decks +19% synergy
Triplicate Titan
20% of 70 decks +19% synergy
Dreamscape Artist
19% of 70 decks +18% synergy
Meteor Golem
19% of 70 decks +17% synergy
Roil Cartographer
18% of 44 decks +17% synergy
Mirran Spy
17% of 70 decks +17% synergy
Jhoira's Familiar
17% of 70 decks +15% synergy
The Reality Chip
17% of 70 decks +14% synergy
Ioreth of the Healing House
16% of 64 decks +14% synergy
Tiller Engine
14% of 70 decks +14% synergy
Tunneling Geopede
14% of 70 decks +14% synergy
Roil Elemental
14% of 70 decks +13% synergy
Blightsteel Colossus
14% of 70 decks +13% synergy
Combustible Gearhulk
14% of 70 decks +12% synergy
Spellskite
14% of 70 decks +11% synergy
Ornithopter of Paradise
14% of 70 decks +10% synergy
Reckless Pyrosurfer
14% of 44 decks +14% synergy
Audacious Reshapers
13% of 70 decks +12% synergy
Burnished Hart
13% of 70 decks +9% synergy
Dockside Extortionist
13% of 70 decks +4% synergy
Forensic Gadgeteer
12% of 51 decks +9% synergy
Tideforce Elemental
11% of 70 decks +11% synergy
Sage of Lat-Nam
11% of 70 decks +11% synergy
Scaretiller
11% of 70 decks +11% synergy
Spitfire Lagac
11% of 70 decks +11% synergy
Kelpie Guide
11% of 70 decks +11% synergy
Nesting Dragon
11% of 70 decks +10% synergy
Instants
Whir of Invention
37% of 70 decks +34% synergy
An Offer You Can't Refuse
37% of 70 decks +16% synergy
Chaos Warp
36% of 70 decks +4% synergy
Path to Exile
33% of 12 decks -13% synergy
Swords to Plowshares
33% of 12 decks -29% synergy
Pongify
24% of 70 decks +13% synergy
Arcane Denial
24% of 70 decks +4% synergy
Dramatic Reversal
23% of 70 decks +18% synergy
Negate
23% of 70 decks +0% synergy
Reality Shift
21% of 70 decks +13% synergy
Mana Drain
21% of 70 decks +7% synergy
Three Steps Ahead
21% of 47 decks +18% synergy
Rapid Hybridization
20% of 70 decks +11% synergy
Desynchronization
19% of 43 decks +16% synergy
Resculpt
16% of 70 decks +11% synergy
Swan Song
14% of 70 decks -2% synergy
Demand Answers
13% of 53 decks +8% synergy
Masterful Replication
11% of 70 decks +11% synergy
Brainstorm
11% of 70 decks -8% synergy
Disruption Protocol
10% of 70 decks +9% synergy
Shore Up
10% of 70 decks +8% synergy
Muddle the Mixture
10% of 70 decks +5% synergy
Deflecting Swat
10% of 70 decks -6% synergy
Thirst for Knowledge
9% of 70 decks +7% synergy
Abrade
9% of 70 decks -3% synergy
Stoic Rebuttal
7% of 70 decks +7% synergy
Unwind
7% of 70 decks +4% synergy
Galvanic Discharge
7% of 44 decks +6% synergy
Cerulean Wisps
6% of 70 decks +5% synergy
Ghostly Flicker
6% of 70 decks +1% synergy
Frantic Search
6% of 70 decks -7% synergy
Sorceries
Fabricate
37% of 70 decks +31% synergy
Thoughtcast
36% of 70 decks +32% synergy
Jolted Awake
33% of 9 decks +33% synergy
Feed the Swarm
27% of 11 decks +10% synergy
Trash for Treasure
21% of 70 decks +20% synergy
Vandalblast
21% of 70 decks +6% synergy
Scrap Mastery
16% of 70 decks +15% synergy
Rise and Shine
16% of 70 decks +14% synergy
Season of Weaving
15% of 40 decks +13% synergy
Nahiri's Lithoforming
14% of 70 decks +14% synergy
One with the Machine
14% of 70 decks +13% synergy
Saheeli's Directive
11% of 70 decks +11% synergy
Reverse Engineer
10% of 70 decks +10% synergy
Reshape
9% of 70 decks +7% synergy
Rite of Replication
9% of 70 decks +6% synergy
Jeska's Will
9% of 70 decks -8% synergy
Universal Surveillance
7% of 70 decks +7% synergy
Gamble
7% of 70 decks -2% synergy
Faithless Looting
7% of 70 decks -9% synergy
Reckless Handling
6% of 66 decks +4% synergy
Irenicus's Vile Duplication
6% of 70 decks +2% synergy
Utility Artifacts
Executioner's Capsule
36% of 11 decks +36% synergy
Time Sieve
36% of 11 decks +34% synergy
Wayfarer's Bauble
36% of 70 decks +26% synergy
Lightning Greaves
36% of 70 decks +11% synergy
Krark-Clan Ironworks
34% of 70 decks +33% synergy
Ichor Wellspring
33% of 70 decks +31% synergy
Mystic Forge
33% of 70 decks +30% synergy
Automated Assembly Line
30% of 10 decks +29% synergy
Sculpting Steel
30% of 70 decks +28% synergy
Mind Stone
30% of 70 decks +13% synergy
Esoteric Duplicator
28% of 47 decks +27% synergy
Oni-Cult Anvil
27% of 11 decks +26% synergy
Encroaching Mycosynth
27% of 70 decks +26% synergy
Swiftfoot Boots
27% of 70 decks -0% synergy
Shorikai, Genesis Engine
25% of 12 decks +22% synergy
Archaeomancer's Map
25% of 12 decks +22% synergy
Crucible of Worlds
24% of 70 decks +22% synergy
Sting, the Glinting Dagger
23% of 64 decks +22% synergy
Illusionist's Bracers
23% of 70 decks +22% synergy
Clock of Omens
21% of 70 decks +21% synergy
Sensei's Divining Top
21% of 70 decks +16% synergy
Mirrorworks
20% of 70 decks +19% synergy
Rings of Brighthearth
20% of 70 decks +18% synergy
Thousand-Year Elixir
20% of 70 decks +18% synergy
Worldwalker Helm
19% of 47 decks +18% synergy
Prototype Portal
19% of 70 decks +18% synergy
Staff of Domination
19% of 70 decks +17% synergy
Cloud Key
19% of 70 decks +17% synergy
Simulacrum Synthesizer
17% of 47 decks +15% synergy
Mishra's Bauble
16% of 70 decks +14% synergy
Commander's Sphere
16% of 70 decks +1% synergy
Mycosynth Lattice
14% of 70 decks +14% synergy
Moonsilver Key
14% of 70 decks +13% synergy
Portal to Phyrexia
14% of 70 decks +13% synergy
Inspiring Statuary
14% of 70 decks +13% synergy
Hedron Archive
14% of 70 decks +11% synergy
Panharmonicon
14% of 70 decks +10% synergy
Idol of Oblivion
14% of 70 decks +10% synergy
Liquimetal Coating
13% of 70 decks +12% synergy
Mycosynth Wellspring
13% of 70 decks +12% synergy
Lithoform Engine
13% of 70 decks +12% synergy
Expedition Map
13% of 70 decks +10% synergy
Chimil, the Inner Sun
12% of 57 decks +11% synergy
Darksteel Monolith
11% of 61 decks +11% synergy
Tamiyo's Logbook
11% of 70 decks +11% synergy
Amulet of Vigor
11% of 70 decks +10% synergy
Darksteel Forge
11% of 70 decks +10% synergy
Isochron Scepter
11% of 70 decks +9% synergy
Ashnod's Altar
11% of 70 decks +4% synergy
Navigation Orb
10% of 70 decks +9% synergy
Enchantments
Storm the Vault
29% of 70 decks +26% synergy
Retreat to Hagra
27% of 11 decks +26% synergy
Valakut Exploration
27% of 70 decks +25% synergy
Retreat to Emeria
25% of 12 decks +24% synergy
Felidar Retreat
25% of 12 decks +18% synergy
Thopter Spy Network
23% of 70 decks +19% synergy
Freed from the Real
21% of 70 decks +19% synergy
Mirrodin Besieged
19% of 70 decks +17% synergy
Mechanized Production
19% of 70 decks +16% synergy
Trade Routes
14% of 70 decks +14% synergy
Ghirapur Aether Grid
14% of 70 decks +14% synergy
Mystic Remora
14% of 70 decks -3% synergy
Excavation
11% of 70 decks +11% synergy
Intruder Alarm
11% of 70 decks +9% synergy
Determined Iteration
10% of 70 decks +9% synergy
Artificer Class
10% of 70 decks +9% synergy
Pemmin's Aura
10% of 70 decks +9% synergy
Retreat to Valakut
9% of 70 decks +8% synergy
Clan Crafter
6% of 70 decks +5% synergy
Virtue of Knowledge
5% of 59 decks +3% synergy
Planeswalkers
Daretti, Scrap Savant
31% of 70 decks +29% synergy
Saheeli, Filigree Master
13% of 70 decks +12% synergy
Karn, the Great Creator
11% of 70 decks +10% synergy
Saheeli, the Gifted
10% of 70 decks +9% synergy
Tezzeret the Seeker
10% of 70 decks +8% synergy
Saheeli, Sublime Artificer
10% of 70 decks +6% synergy
Tezzeret, Artifice Master
7% of 70 decks +6% synergy
Tezzeret, Betrayer of Flesh
6% of 70 decks +5% synergy
Utility Lands
Inventors' Fair
47% of 70 decks +43% synergy
Reliquary Tower
43% of 70 decks +13% synergy
Treasure Vault
40% of 70 decks +38% synergy
Archway of Innovation
35% of 43 decks +32% synergy
Academy Ruins
33% of 70 decks +28% synergy
Fomori Vault
28% of 47 decks +27% synergy
Urza's Saga
26% of 70 decks +19% synergy
Minamo, School at Water's Edge
16% of 70 decks +11% synergy
Otawara, Soaring City
16% of 70 decks -1% synergy
Terrain Generator
14% of 70 decks +13% synergy
Field of the Dead
13% of 70 decks +10% synergy
Restless Spire
10% of 59 decks +8% synergy
Oboro, Palace in the Clouds
10% of 70 decks +9% synergy
Mystic Sanctuary
10% of 70 decks -2% synergy
Vesuva
9% of 70 decks +7% synergy
Urza's Power Plant
9% of 70 decks +7% synergy
Urza's Mine
9% of 70 decks +7% synergy
Urza's Tower
9% of 70 decks +7% synergy
Thespian's Stage
9% of 70 decks +6% synergy
Rogue's Passage
9% of 70 decks -11% synergy
Blinkmoth Nexus
7% of 70 decks +7% synergy
Mishra's Factory
7% of 70 decks +6% synergy
Mutavault
7% of 70 decks +6% synergy
Guildless Commons
7% of 70 decks +6% synergy
Valakut, the Molten Pinnacle
7% of 70 decks +5% synergy
Arena of Glory
7% of 44 decks +1% synergy
Rivendell
6% of 64 decks +2% synergy
Ghost Town
6% of 70 decks +5% synergy
Tolaria West
6% of 70 decks +5% synergy
Ghost Quarter
6% of 70 decks +3% synergy
Strip Mine
6% of 70 decks +3% synergy
Temple of the False God
6% of 70 decks -4% synergy
Mana Artifacts
Sol Ring
90% of 70 decks +6% synergy
Arcane Signet
83% of 70 decks +11% synergy
Izzet Signet
47% of 70 decks +20% synergy
Talisman of Creativity
46% of 70 decks +17% synergy
Liquimetal Torque
36% of 70 decks +33% synergy
Talisman of Indulgence
27% of 11 decks +0% synergy
Dimir Signet
27% of 11 decks -1% synergy
Rakdos Signet
27% of 11 decks -2% synergy
Talisman of Dominance
27% of 11 decks -5% synergy
Cursed Mirror
27% of 70 decks +22% synergy
Fellwar Stone
26% of 70 decks +5% 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
Thought Vessel
21% of 70 decks +4% synergy
Patriar's Seal
20% of 70 decks +18% synergy
Thran Dynamo
20% of 70 decks +15% synergy
Machine God's Effigy
13% of 70 decks +12% synergy
Basalt Monolith
13% of 70 decks +10% synergy
Crystal Skull, Isu Spyglass
12% of 43 decks +10% synergy
Gilded Lotus
11% of 70 decks +8% synergy
Chromatic Lantern
11% of 70 decks +2% synergy
Misleading Signpost
10% of 59 decks +9% synergy
Coveted Jewel
9% of 70 decks +8% synergy
Mox Opal
9% of 70 decks +4% synergy
Chromatic Orrery
7% of 70 decks +6% synergy
Mox Amber
7% of 70 decks +3% synergy
Midnight Clock
7% of 70 decks +2% synergy
Blinkmoth Urn
6% of 70 decks +5% synergy
Mana Crypt
6% of 70 decks -0% synergy
Lands
Slagwoods Bridge
100% of 3 decks +97% synergy
Tanglepool Bridge
100% of 3 decks +97% synergy
Stomping Ground
100% of 3 decks +60% synergy
Breeding Pool
100% of 3 decks +60% synergy
Command Tower
83% of 70 decks +9% synergy
Drossforge Bridge
82% of 11 decks +78% synergy
Mistvault Bridge
82% of 11 decks +78% synergy
Silverbluff Bridge
79% of 70 decks +73% synergy
Hallowed Fountain
67% of 12 decks +26% synergy
Steam Vents
60% of 70 decks +22% synergy
Razortide Bridge
58% of 12 decks +52% synergy
Sacred Foundry
58% of 12 decks +23% synergy
Sulfur Falls
56% of 70 decks +23% synergy
Xander's Lounge
55% of 11 decks +29% synergy
Watery Grave
55% of 11 decks +14% synergy
Rustvale Bridge
50% of 12 decks +45% synergy
Izzet Boilerworks
49% of 70 decks +33% synergy
Scalding Tarn
41% of 70 decks +31% synergy
Shivan Reef
41% of 70 decks +14% synergy
Training Center
37% of 70 decks +10% synergy
Haunted Ridge
36% of 11 decks +20% synergy
Luxury Suite
36% of 11 decks +10% synergy
Dragonskull Summit
36% of 11 decks +4% synergy
Blood Crypt
36% of 11 decks -2% synergy
Stormcarved Coast
33% of 70 decks +15% synergy
Dimir Aqueduct
27% of 11 decks +11% synergy
Morphic Pool
27% of 11 decks +1% synergy
Drowned Catacomb
27% of 11 decks +0% synergy
Spire of Industry
26% of 70 decks +23% synergy
Cascade Bluffs
26% of 70 decks +13% synergy
Terramorphic Expanse
26% of 70 decks +10% synergy
Myriad Landscape
26% of 70 decks +7% synergy
Boros Garrison
25% of 12 decks +11% synergy
Azorius Chancery
25% of 12 decks +10% synergy
Raugrin Triome
25% of 12 decks -1% synergy
Sea of Clouds
25% of 12 decks -1% synergy
Glacial Fortress
25% of 12 decks -3% synergy
Clifftop Retreat
25% of 12 decks -5% synergy
Evolving Wilds
24% of 70 decks +3% synergy
Scene of the Crime
23% of 52 decks +22% synergy
Power Depot
23% of 70 decks +22% synergy
Frostboil Snarl
23% of 70 decks +8% synergy
Exotic Orchard
21% of 70 decks -15% synergy
Ferrous Lake
20% of 49 decks +13% synergy
Fabled Passage
19% of 70 decks +10% synergy
The Mycosynth Gardens
16% of 70 decks +14% synergy
Riverglide Pathway
16% of 70 decks +7% synergy
Thundering Falls
15% of 52 decks +7% synergy
Maestros Theater
14% of 70 decks +13% synergy
Fiery Islet
14% of 70 decks +7% synergy