Urza, Prince of Kroog + Metalworker + Retreat to Coralhelm + Treasure Vault

Urza, Prince of Kroog
Metalworker
Retreat to Coralhelm
Treasure Vault

Requires
Urza, Prince of Kroog must be on the battlefield. Metalworker must be on the battlefield. Retreat to Coralhelm must be on the battlefield. Treasure Vault must be on the battlefield. You have at least three artifact cards in hand. Metalworker does not have summoning sickness.
Steps
  1. Activate Metalworker by tapping it and revealing at least three artifact cards from your hand, adding at least six .
  2. Activate Urza by paying 6, creating a token copy of Treasure Vault that is a 1/1 Soldier.
  3. When the Treasure Vault token enters the battlefield, Retreat to Coralhelm triggers, untapping Metalworker.
  4. Repeat.
  5. If you have four or more artifact cards in hand, this combo nets infinite colorless mana, and you may target any artifact you control to get infinite copies of them.
Results
Infinite colorless mana. Infinite copies of each artifact you control. Infinite creature tokens. Infinite ETB. Infinite landfall triggers.

Bjorna, Nightfall Alchemist // Sophina, Spearsage Deserter
0.63% of 158 decks 1 decks
Creatures
Slobad, Goblin Tinkerer
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Workshop Assistant
100% of 1 decks +100% synergy
Audacious Reshapers
100% of 1 decks +100% synergy
Junk Diver
100% of 1 decks +100% synergy
Teshar, Ancestor's Apostle
100% of 1 decks +99% synergy
Glóin, Dwarf Emissary
100% of 1 decks +99% synergy
Feldon of the Third Path
100% of 1 decks +99% synergy
Ingenious Artillerist
100% of 1 decks +99% synergy
Academy Manufactor
100% of 1 decks +99% synergy
Gandalf the White
100% of 1 decks +99% synergy
Vedalken Archmage
100% of 1 decks +99% synergy
Myr Retriever
100% of 1 decks +99% synergy
Master Transmuter
100% of 1 decks +99% synergy
Osgir, the Reconstructor
100% of 1 decks +99% synergy
Scrap Trawler
100% of 1 decks +98% synergy
Reckless Fireweaver
100% of 1 decks +98% synergy
Myr Battlesphere
100% of 1 decks +98% synergy
Goblin Welder
100% of 1 decks +98% synergy
Urza, Lord Protector
100% of 1 decks +98% synergy
Urza, Lord High Artificer
100% of 1 decks +97% synergy
Sai, Master Thopterist
100% of 1 decks +95% synergy
Emry, Lurker of the Loch
100% of 1 decks +95% synergy
Oltec Matterweaver
100% of 1 decks +94% synergy
Illustrious Wanderglyph
100% of 1 decks +93% synergy
Foundry Inspector
100% of 1 decks +93% synergy
Professional Face-Breaker
100% of 1 decks +93% synergy
Jhoira, Weatherlight Captain
100% of 1 decks +92% synergy
Enthusiastic Mechanaut
100% of 1 decks +92% synergy
Etherium Sculptor
100% of 1 decks +92% synergy
Esper Sentinel
100% of 1 decks +79% synergy
Instants
Dispatch
100% of 1 decks +91% synergy
Mana Drain
100% of 1 decks +88% synergy
Arcane Denial
100% of 1 decks +83% synergy
Swords to Plowshares
100% of 1 decks +32% synergy
Sorceries
Saheeli's Directive
100% of 1 decks +100% synergy
Organic Extinction
100% of 1 decks +96% synergy
Utility Artifacts
Prized Statue
100% of 1 decks +100% synergy
Krark-Clan Ironworks
100% of 1 decks +99% synergy
Soul-Guide Lantern
100% of 1 decks +99% synergy
Ichor Wellspring
100% of 1 decks +99% synergy
Mishra's Bauble
100% of 1 decks +98% synergy
Worldwalker Helm
100% of 1 decks +98% synergy
Ashnod's Altar
100% of 1 decks +98% synergy
Sculpting Steel
100% of 1 decks +98% synergy
Basilisk Collar
100% of 1 decks +97% synergy
Cloud Key
100% of 1 decks +97% synergy
Unwinding Clock
100% of 1 decks +96% synergy
The One Ring
100% of 1 decks +92% synergy
Enchantments
Mirrodin Besieged
100% of 1 decks +98% synergy
Court of Vantress
100% of 1 decks +97% synergy
Smothering Tithe
100% of 1 decks +75% synergy
Rhystic Study
100% of 1 decks +74% synergy
Utility Lands
Mishra's Workshop
100% of 1 decks +100% synergy
Darksteel Citadel
100% of 1 decks +95% synergy
Academy Ruins
100% of 1 decks +94% synergy
Great Furnace
100% of 1 decks +93% synergy
Ancient Den
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Seat of the Synod
100% of 1 decks +93% synergy
Urza's Saga
100% of 1 decks +92% synergy
Ancient Tomb
100% of 1 decks +90% synergy
Reliquary Tower
100% of 1 decks +65% synergy
Mana Artifacts
Machine God's Effigy
100% of 1 decks +100% synergy
The Mightstone and Weakstone
100% of 1 decks +98% synergy
Cursed Mirror
100% of 1 decks +97% synergy
Mox Amber
100% of 1 decks +96% synergy
Mox Opal
100% of 1 decks +94% synergy
Mind Stone
100% of 1 decks +84% synergy
Boros Signet
100% of 1 decks +62% synergy
Izzet Signet
100% of 1 decks +59% synergy
Azorius Signet
100% of 1 decks +58% synergy
Arcane Signet
100% of 1 decks +11% synergy
Sol Ring
100% of 1 decks +10% synergy
Lands
The Mycosynth Gardens
100% of 1 decks +98% synergy
Gemstone Caverns
100% of 1 decks +95% synergy
Reflecting Pool
100% of 1 decks +93% synergy
Spire of Industry
100% of 1 decks +91% synergy
Volcanic Island
100% of 1 decks +88% synergy
Plateau
100% of 1 decks +88% synergy
Tundra
100% of 1 decks +88% synergy
Flooded Strand
100% of 1 decks +71% synergy
Scalding Tarn
100% of 1 decks +71% synergy
Arid Mesa
100% of 1 decks +70% synergy
Sacred Foundry
100% of 1 decks +59% synergy
Steam Vents
100% of 1 decks +57% synergy
Hallowed Fountain
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Command Tower
100% of 1 decks +8% synergy