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

Goblin Welder
Retreat to Coralhelm
Seat of the Synod
Ancient Den

Requires
Goblin Welder must be on the battlefield. Retreat to Coralhelm must be on the battlefield. Seat of the Synod 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 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
Infinite blue mana. Infinite landfall triggers. Infinite white mana.

Ishai, Ojutai Dragonspeaker // Toggo, Goblin Weaponsmith
11.76% of 34 decks 4 decks
Dr. Madison Li
0.19% of 3764 decks 7 decks
Breya, Etherium Shaper
0.01% of 13775 decks 2 decks
High Synergy Cards
Galvanic Discharge
100% of 7 decks +99% synergy
Tune the Narrative
100% of 7 decks +99% synergy
Roil Cartographer
100% of 7 decks +99% synergy
Jolted Awake
100% of 7 decks +98% synergy
Izzet Generatorium
100% of 7 decks +97% synergy
Guide of Souls
100% of 7 decks +96% synergy
Top Cards
Aether Revolt
86% of 7 decks +85% synergy
Wrath of the Skies
86% of 7 decks +85% synergy
Rush of Inspiration
86% of 7 decks +83% synergy
Automated Assembly Line
78% of 9 decks +77% synergy
Esper Sentinel
76% of 17 decks +56% synergy
Aether Refinery
75% of 8 decks +74% synergy
Volatile Stormdrake
75% of 8 decks +71% synergy
Unstable Amulet
71% of 7 decks +70% synergy
Goblin Engineer
71% of 17 decks +67% synergy
Foundry Inspector
65% of 17 decks +60% synergy
Creatures
Etherium Sculptor
65% of 17 decks +59% synergy
Ruin Ghost
59% of 17 decks +59% synergy
Teshar, Ancestor's Apostle
53% of 17 decks +50% synergy
Phyrexian Metamorph
47% of 17 decks +40% synergy
Whirler Virtuoso
41% of 17 decks +41% synergy
Vedalken Archmage
41% of 17 decks +40% synergy
Spellskite
41% of 17 decks +38% synergy
The Reality Chip
41% of 17 decks +37% synergy
Imperial Recruiter
41% of 17 decks +35% synergy
Hullbreaker Horror
41% of 17 decks +34% synergy
Electrostatic Pummeler
35% of 17 decks +35% synergy
Lion Sash
35% of 17 decks +32% synergy
Brotherhood Scribe
33% of 9 decks +32% synergy
Salvager of Ruin
29% of 17 decks +29% synergy
Urza, Lord High Artificer
29% of 17 decks +26% synergy
Thought Monitor
29% of 17 decks +26% synergy
Walking Atlas
24% of 17 decks +23% synergy
Myr Retriever
24% of 17 decks +21% synergy
Brudiclad, Telchor Engineer
24% of 17 decks +20% synergy
Enthusiastic Mechanaut
24% of 17 decks +20% synergy
Reckless Fireweaver
24% of 17 decks +19% synergy
Solemn Simulacrum
24% of 17 decks +9% synergy
Dreamscape Artist
18% of 17 decks +17% synergy
Junk Diver
18% of 17 decks +17% synergy
Master Transmuter
18% of 17 decks +16% synergy
Wurmcoil Engine
18% of 17 decks +16% synergy
Palladium Myr
18% of 17 decks +16% synergy
Myr Battlesphere
18% of 17 decks +15% synergy
Puresteel Paladin
18% of 17 decks +14% synergy
Sai, Master Thopterist
18% of 17 decks +14% synergy
Academy Manufactor
18% of 17 decks +14% synergy
Jhoira, Weatherlight Captain
18% of 17 decks +12% synergy
Instants
Dispatch
65% of 17 decks +60% synergy
Radstorm
60% of 10 decks +58% synergy
Enlightened Tutor
59% of 17 decks +41% synergy
An Offer You Can't Refuse
56% of 16 decks +36% synergy
Cyclonic Rift
53% of 17 decks +25% synergy
Path to Exile
53% of 17 decks +8% synergy
Swords to Plowshares
47% of 17 decks -16% synergy
Kabira Takedown
35% of 17 decks +34% synergy
Sejiri Shelter
35% of 17 decks +32% synergy
Teferi's Protection
35% of 17 decks +15% synergy
Silence
29% of 17 decks +23% synergy
Swan Song
29% of 17 decks +13% synergy
Harnessed Lightning
24% of 17 decks +23% synergy
Glimmer of Genius
24% of 17 decks +23% synergy
Mana Drain
18% of 17 decks +2% synergy
Fierce Guardianship
18% of 17 decks -0% synergy
Sorceries
Fabricate
41% of 17 decks +35% synergy
Thoughtcast
29% of 17 decks +26% synergy
Sea Gate Restoration
24% of 17 decks +19% synergy
Utility Artifacts
Mishra's Bauble
53% of 17 decks +52% synergy
Sensei's Divining Top
47% of 17 decks +41% synergy
Decoction Module
41% of 17 decks +41% synergy
Skullclamp
41% of 17 decks +29% synergy
Portal to Phyrexia
40% of 15 decks +38% synergy
Glass Casket
35% of 17 decks +35% synergy
Aetherworks Marvel
35% of 17 decks +35% synergy
Gonti's Aether Heart
35% of 17 decks +35% synergy
Portable Hole
35% of 17 decks +35% synergy
Cloud Key
35% of 17 decks +33% synergy
Shorikai, Genesis Engine
35% of 17 decks +32% synergy
Wayfarer's Bauble
29% of 17 decks +19% synergy
Krark-Clan Ironworks
24% of 17 decks +22% synergy
Mystic Forge
24% of 17 decks +21% synergy
Navigation Orb
19% of 16 decks +18% synergy
Amulet of Vigor
18% of 17 decks +17% synergy
Ichor Wellspring
18% of 17 decks +16% synergy
Crucible of Worlds
18% of 17 decks +15% synergy
Unwinding Clock
18% of 17 decks +15% synergy
Archaeomancer's Map
18% of 17 decks +14% synergy
Panharmonicon
18% of 17 decks +14% synergy
Enchantments
All Will Be One
50% of 14 decks +47% synergy
Rhystic Study
41% of 17 decks +13% synergy
Mystic Remora
35% of 17 decks +17% synergy
Felidar Retreat
29% of 17 decks +22% synergy
Retreat to Emeria
18% of 17 decks +17% synergy
Valakut Exploration
18% of 17 decks +15% synergy
Storm the Vault
18% of 17 decks +14% synergy
Smothering Tithe
18% of 17 decks -8% synergy
Utility Lands
Vault of Whispers
100% of 3 decks +96% synergy
Great Furnace
100% of 17 decks +94% synergy
Fomori Vault
75% of 8 decks +73% synergy
Inventors' Fair
59% of 17 decks +55% synergy
Darksteel Citadel
53% of 17 decks +49% synergy
Oboro, Palace in the Clouds
29% of 17 decks +29% synergy
Treasure Vault
24% of 17 decks +21% synergy
Reliquary Tower
24% of 17 decks -6% synergy
Buried Ruin
18% of 17 decks +12% synergy
Urza's Saga
18% of 17 decks +10% synergy
Mana Artifacts
Arcane Signet
94% of 17 decks +22% synergy
Sol Ring
94% of 17 decks +10% synergy
Talisman of Progress
47% of 17 decks +25% synergy
Talisman of Creativity
47% of 17 decks +18% synergy
Conversion Apparatus
43% of 7 decks +42% synergy
Mox Amber
41% of 17 decks +37% synergy
Everflowing Chalice
35% of 17 decks +31% synergy
Mana Vault
35% of 17 decks +29% synergy
Lotus Petal
35% of 17 decks +29% synergy
Mox Opal
29% of 17 decks +25% synergy
Jeweled Amulet
24% of 17 decks +23% synergy
Chrome Mox
24% of 17 decks +17% synergy
Boros Signet
24% of 17 decks -0% synergy
Azorius Signet
24% of 17 decks -3% synergy
Izzet Signet
24% of 17 decks -5% synergy
Paradise Mantle
18% of 17 decks +17% synergy
Thought Vessel
18% of 17 decks +1% synergy
Fellwar Stone
18% of 17 decks -3% synergy
Lands
Command Tower
82% of 17 decks +9% synergy
Steam Vents
76% of 17 decks +37% synergy
Hallowed Fountain
76% of 17 decks +35% synergy
Sacred Foundry
71% of 17 decks +34% synergy
Spire of Industry
53% of 17 decks +50% synergy
Training Center
53% of 17 decks +25% synergy
Flooded Strand
47% of 17 decks +37% synergy
Scalding Tarn
47% of 17 decks +36% synergy
Glacial Fortress
47% of 17 decks +22% synergy
Clifftop Retreat
47% of 17 decks +20% synergy
Sulfur Falls
47% of 17 decks +17% synergy
Aether Hub
41% of 17 decks +41% synergy
Hengegate Pathway
41% of 17 decks +33% synergy
Riverglide Pathway
41% of 17 decks +32% synergy
Needleverge Pathway
41% of 17 decks +32% synergy
Arid Mesa
41% of 17 decks +30% synergy
Spectator Seating
41% of 17 decks +16% synergy
Sea of Clouds
41% of 17 decks +15% synergy
Razortide Bridge
35% of 17 decks +28% synergy
Fabled Passage
35% of 17 decks +26% synergy
Rustvale Bridge
29% of 17 decks +24% synergy
Silverbluff Bridge
24% of 17 decks +17% synergy
Battlefield Forge
24% of 17 decks -2% synergy
Azorius Chancery
18% of 17 decks +3% synergy
Boros Garrison
18% of 17 decks +3% synergy
Terramorphic Expanse
18% of 17 decks +2% synergy
Izzet Boilerworks
18% of 17 decks +1% synergy
Evolving Wilds
18% of 17 decks -3% synergy
Raugrin Triome
18% of 17 decks -9% synergy