Goblin Welder
Retreat to Coralhelm
Seat of the Synod
Ancient Den
1

   Prerequisites

What do I need to start this combo?
Seat of the Synod 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 Seat of the Synod from your graveyard to the battlefield.
2
Seat of the Synod enters the battlefield, triggering Retreat to Coralhelm, untapping Goblin Welder.
3
Activate Seat of the Synod by tapping it, adding .
4
Activate Goblin Welder by tapping it, causing you to sacrifice Seat of the Synod 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 blue mana
Infinite landfall triggers
Infinite white mana
Dr. Madison Li
0.22% of 5460 decks 12 decks
Breya, Etherium Shaper
0.03% of 15494 decks 5 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
Elmar, Ulvenwald Informant // Hargilde, Kindly Runechanter
0.14% of 713 decks 1 decks
Akiri, Line-Slinger // Thrasios, Triton Hero
0.16% of 626 decks 1 decks
Elsha of the Infinite
0.02% of 4497 decks 1 decks
Omnath, Locus of All
0.01% of 14360 decks 1 decks
High Synergy Cards
Vault of Whispers
100% of 6 decks +96% synergy
Great Furnace
100% of 26 decks +95% synergy
Etherium Sculptor
73% of 26 decks +68% synergy
Dispatch
69% of 26 decks +64% synergy
Marionette Master
67% of 6 decks +64% synergy
Goblin Engineer
62% of 26 decks +58% synergy
Inventors' Fair
62% of 26 decks +58% synergy
Guide of Souls
59% of 22 decks +57% synergy
Automated Assembly Line
57% of 23 decks +56% synergy
Roil Cartographer
55% of 22 decks +54% synergy
Top Cards
Esper Sentinel
58% of 26 decks +38% synergy
Izzet Generatorium
55% of 22 decks +52% synergy
Foundry Inspector
54% of 26 decks +50% synergy
Sensei's Divining Top
54% of 26 decks +49% synergy
Aether Revolt
50% of 22 decks +49% synergy
Jolted Awake
50% of 22 decks +49% synergy
Aether Refinery
50% of 22 decks +49% synergy
Whirler Virtuoso
50% of 26 decks +49% synergy
Electrostatic Pummeler
46% of 26 decks +46% synergy
Decoction Module
46% of 26 decks +46% synergy
Game Changers
Cyclonic Rift
38% of 26 decks +12% synergy
Urza, Lord High Artificer
31% of 26 decks +28% synergy
Mana Vault
31% of 26 decks +25% synergy
Enlightened Tutor
31% of 26 decks +14% synergy
Rhystic Study
27% of 26 decks +0% synergy
Chrome Mox
23% of 26 decks +17% synergy
Teferi's Protection
19% of 26 decks +0% synergy
Fierce Guardianship
12% of 26 decks -7% synergy
Smothering Tithe
12% of 26 decks -12% synergy
Creatures
Reckless Fireweaver
42% of 26 decks +38% synergy
Phyrexian Metamorph
42% of 26 decks +35% synergy
Vedalken Archmage
38% of 26 decks +37% synergy
The Reality Chip
38% of 26 decks +35% synergy
Jhoira, Weatherlight Captain
38% of 26 decks +33% synergy
Riptide Gearhulk
36% of 11 decks +33% synergy
Brotherhood Scribe
35% of 23 decks +34% synergy
Ruin Ghost
35% of 26 decks +34% synergy
Kappa Cannoneer
35% of 26 decks +32% synergy
Solemn Simulacrum
35% of 26 decks +21% synergy
Blaster Hulk
32% of 22 decks +31% synergy
Teshar, Ancestor's Apostle
31% of 26 decks +29% synergy
Thought Monitor
31% of 26 decks +28% synergy
Assaultron Dominator
30% of 23 decks +30% synergy
Mendicant Core, Guidelight
27% of 11 decks +26% synergy
Spellskite
27% of 26 decks +24% synergy
Enthusiastic Mechanaut
27% of 26 decks +23% synergy
Hullbreaker Horror
27% of 26 decks +20% synergy
Liberty Prime, Recharged
26% of 23 decks +24% synergy
Master Transmuter
23% of 26 decks +22% synergy
Imperial Recruiter
23% of 26 decks +18% synergy
Aurora Shifter
23% of 22 decks +22% synergy
Volatile Stormdrake
23% of 22 decks +20% synergy
Aethergeode Miner
19% of 26 decks +19% synergy
Lightning Runner
19% of 26 decks +19% synergy
Wurmcoil Engine
19% of 26 decks +18% synergy
Myr Retriever
19% of 26 decks +17% synergy
Lion Sash
19% of 26 decks +16% synergy
Sai, Master Thopterist
19% of 26 decks +16% synergy
Emry, Lurker of the Loch
19% of 26 decks +15% synergy
Sphinx of the Revelation
18% of 22 decks +17% synergy
Marvin, Murderous Mimic
16% of 19 decks +14% synergy
Salvager of Ruin
15% of 26 decks +15% synergy
Walking Atlas
15% of 26 decks +15% synergy
Urza, Lord Protector
15% of 26 decks +14% synergy
Myr Battlesphere
15% of 26 decks +14% synergy
Brudiclad, Telchor Engineer
15% of 26 decks +12% synergy
Burnished Hart
15% of 26 decks +12% synergy
Satya, Aetherflux Genius
14% of 22 decks +13% synergy
Paladin Danse, Steel Maverick
13% of 23 decks +12% synergy
Forensic Gadgeteer
13% of 23 decks +11% synergy
Trove Warden
12% of 26 decks +11% synergy
Aetherstorm Roc
12% of 26 decks +11% synergy
Dreamscape Artist
12% of 26 decks +11% synergy
Junk Diver
12% of 26 decks +11% synergy
Oswald Fiddlebender
12% of 26 decks +10% synergy
Scrap Trawler
12% of 26 decks +10% synergy
Shimmer Dragon
12% of 26 decks +10% synergy
Puresteel Paladin
12% of 26 decks +8% synergy
Ornithopter of Paradise
12% of 26 decks +7% synergy
Instants
An Offer You Can't Refuse
46% of 26 decks +25% synergy
Path to Exile
46% of 26 decks -1% synergy
Tune the Narrative
45% of 22 decks +45% synergy
Swords to Plowshares
42% of 26 decks -20% synergy
Galvanic Discharge
41% of 22 decks +40% synergy
Electrosiphon
35% of 23 decks +33% synergy
Glimmer of Genius
27% of 26 decks +26% synergy
Swan Song
27% of 26 decks +10% synergy
Sejiri Shelter
23% of 26 decks +20% synergy
Silence
23% of 26 decks +17% synergy
Rush of Inspiration
23% of 22 decks +21% synergy
Harnessed Lightning
19% of 26 decks +19% synergy
Aether Spike
18% of 22 decks +18% synergy
Radstorm
17% of 24 decks +15% synergy
Kabira Takedown
15% of 26 decks +14% synergy
Whir of Invention
15% of 26 decks +13% synergy
Dramatic Reversal
15% of 26 decks +11% synergy
Counterspell
15% of 26 decks -27% synergy
Aetherize
12% of 26 decks +5% synergy
Mana Drain
12% of 26 decks -3% synergy
Sorceries
Fabricate
38% of 26 decks +33% synergy
Wrath of the Skies
36% of 22 decks +36% synergy
Thoughtcast
19% of 26 decks +16% synergy
Localized Destruction
18% of 22 decks +18% synergy
Sea Gate Restoration
15% of 26 decks +11% synergy
Wheel of Potential
14% of 22 decks +13% synergy
Wake the Past
12% of 26 decks +9% synergy
Ponder
12% of 26 decks -1% synergy
Farewell
12% of 26 decks -1% synergy
Utility Artifacts
Thopter Foundry
50% of 6 decks +48% synergy
Cloud Key
46% of 26 decks +44% synergy
Aetherflux Conduit
45% of 11 decks +45% synergy
Unstable Amulet
45% of 22 decks +44% synergy
Gonti's Aether Heart
42% of 26 decks +42% synergy
Mishra's Bauble
38% of 26 decks +37% synergy
Shorikai, Genesis Engine
38% of 26 decks +36% synergy
Portal to Phyrexia
35% of 26 decks +33% synergy
Panharmonicon
35% of 26 decks +31% synergy
Skullclamp
35% of 26 decks +23% synergy
Aetherworks Marvel
31% of 26 decks +30% synergy
Unwinding Clock
27% of 26 decks +24% synergy
Lotus Petal
27% of 26 decks +20% synergy
Glass Casket
23% of 26 decks +23% synergy
Krark-Clan Ironworks
23% of 26 decks +22% synergy
Mystic Forge
23% of 26 decks +20% synergy
Wayfarer's Bauble
23% of 26 decks +14% synergy
Portable Hole
19% of 26 decks +19% synergy
Sculpting Steel
19% of 26 decks +17% synergy
Isochron Scepter
19% of 26 decks +17% synergy
Dynavolt Tower
15% of 26 decks +15% synergy
Clock of Omens
15% of 26 decks +14% synergy
Ichor Wellspring
15% of 26 decks +14% synergy
Sword of the Meek
12% of 26 decks +11% synergy
Thornbite Staff
12% of 26 decks +11% synergy
Amulet of Vigor
12% of 26 decks +11% synergy
Encroaching Mycosynth
12% of 26 decks +11% synergy
Archaeomancer's Map
12% of 26 decks +8% synergy
Lightning Greaves
12% of 26 decks -13% synergy
Enchantments
All Will Be One
35% of 26 decks +32% synergy
Unstoppable Plan
27% of 11 decks +25% synergy
Mechanized Production
23% of 26 decks +20% synergy
Felidar Retreat
19% of 26 decks +13% synergy
Era of Innovation
15% of 26 decks +15% synergy
Storm the Vault
15% of 26 decks +12% synergy
Mystic Remora
15% of 26 decks -2% synergy
Retreat to Emeria
12% of 26 decks +11% synergy
Planeswalkers
Daretti, Scrap Savant
12% of 26 decks +9% synergy
Tezzeret the Seeker
12% of 26 decks +9% synergy
Utility Lands
Tree of Tales
100% of 3 decks +98% synergy
Fomori Vault
48% of 23 decks +47% synergy
Darksteel Citadel
46% of 26 decks +43% synergy
Amonkhet Raceway
27% of 11 decks +26% synergy
Muraganda Raceway
27% of 11 decks +26% synergy
Treasure Vault
23% of 26 decks +21% synergy
Urza's Saga
23% of 26 decks +16% synergy
Reliquary Tower
23% of 26 decks -7% synergy
HELIOS One
22% of 23 decks +21% synergy
Oboro, Palace in the Clouds
15% of 26 decks +15% synergy
Academy Ruins
15% of 26 decks +11% synergy
Buried Ruin
12% of 26 decks +7% synergy
Mana Artifacts
Sol Ring
96% of 26 decks +12% synergy
Arcane Signet
85% of 26 decks +12% synergy
Talisman of Creativity
54% of 26 decks +25% synergy
Talisman of Progress
35% of 26 decks +10% synergy
Mox Amber
31% of 26 decks +26% synergy
Everflowing Chalice
31% of 26 decks +26% synergy
Aetheric Amplifier
27% of 11 decks +26% synergy
Mox Opal
23% of 26 decks +19% synergy
Paradise Mantle
19% of 26 decks +18% synergy
Conversion Apparatus
18% of 22 decks +18% synergy
Solar Transformer
18% of 22 decks +18% synergy
Chromatic Lantern
15% of 26 decks +6% synergy
Thought Vessel
15% of 26 decks -2% synergy
Fellwar Stone
15% of 26 decks -6% synergy
Talisman of Conviction
15% of 26 decks -8% synergy
Jeweled Amulet
12% of 26 decks +11% synergy
Machine God's Effigy
12% of 26 decks +10% synergy
Liquimetal Torque
12% of 26 decks +8% synergy
Cursed Mirror
12% of 26 decks +6% synergy
Boros Signet
12% of 26 decks -11% synergy
Azorius Signet
12% of 26 decks -13% synergy
Izzet Signet
12% of 26 decks -16% synergy
Lands
Command Tower
92% of 26 decks +18% synergy
Sacred Foundry
65% of 26 decks +30% synergy
Steam Vents
65% of 26 decks +27% synergy
Hallowed Fountain
65% of 26 decks +25% synergy
Spire of Industry
54% of 26 decks +51% synergy
Aether Hub
50% of 26 decks +50% synergy
Drossforge Bridge
50% of 6 decks +46% synergy
Goldmire Bridge
50% of 6 decks +46% synergy
Glacial Fortress
50% of 26 decks +22% synergy
Clifftop Retreat
50% of 26 decks +19% synergy
Scalding Tarn
46% of 26 decks +35% synergy
Flooded Strand
46% of 26 decks +35% synergy
Sulfur Falls
46% of 26 decks +14% synergy
Arid Mesa
42% of 26 decks +32% synergy
Sea of Clouds
42% of 26 decks +16% synergy
Training Center
42% of 26 decks +16% synergy
Razortide Bridge
35% of 26 decks +28% synergy
Raugrin Triome
35% of 26 decks +9% synergy
Rustvale Bridge
31% of 26 decks +26% synergy
Battlefield Forge
31% of 26 decks +5% synergy
Silverbluff Bridge
23% of 26 decks +17% synergy
Exotic Orchard
23% of 26 decks -13% synergy
Hengegate Pathway
19% of 26 decks +12% synergy
Riverglide Pathway
19% of 26 decks +11% synergy
Needleverge Pathway
19% of 26 decks +11% synergy
Stormcarved Coast
19% of 26 decks +1% synergy
Spectator Seating
19% of 26 decks -5% synergy
Thundering Falls
17% of 23 decks +9% synergy
Reflecting Pool
15% of 26 decks +10% synergy
Fabled Passage
15% of 26 decks +6% synergy
Cascade Bluffs
15% of 26 decks +3% synergy
Terramorphic Expanse
15% of 26 decks -0% synergy
Deserted Beach
15% of 26 decks -1% synergy
Adarkar Wastes
15% of 26 decks -4% synergy
Evolving Wilds
15% of 26 decks -6% synergy
Power Depot
12% of 26 decks +11% synergy
Bloodstained Mire
12% of 26 decks +1% synergy
Polluted Delta
12% of 26 decks +0% synergy
Boros Garrison
12% of 26 decks -3% synergy
Azorius Chancery
12% of 26 decks -3% synergy
Myriad Landscape
12% of 26 decks -7% synergy
Mystic Monastery
12% of 26 decks -16% synergy
Shivan Reef
12% of 26 decks -16% synergy
Prairie Stream
12% of 26 decks -22% synergy