Prototype Portal + Retreat to Coralhelm + Ensoul Artifact + Great Furnace

Prototype Portal
Retreat to Coralhelm
Ensoul Artifact
Great Furnace

Requires
Prototype Portal must be on the battlefield. Retreat to Coralhelm must be on the battlefield. Ensoul Artifact must be on the battlefield. Great Furnace must be in exile (exiled by Prototype Portal).
Steps
  1. Activate Prototype Portal by tapping it, creating a token copy of Great Furnace.
  2. When the Great Furnace token enters the battlefield, Retreat to Coralhelm triggers, untapping Prototype Portal.
  3. Repeat.
Results
Infinite Great Furnace tokens. Infinite landfall triggers. Infinite red mana.

Top Commanders
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Game Changers
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50% of 2 decks +50% synergy
Sphinx of Uthuun
50% of 2 decks +50% synergy
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50% of 2 decks +50% synergy
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50% of 2 decks +50% synergy
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50% of 2 decks +50% synergy
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50% of 2 decks +50% synergy
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50% of 2 decks +50% synergy
Kefnet the Mindful
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Gadwick, the Wizened
50% of 2 decks +50% synergy
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50% of 2 decks +50% synergy
Tidespout Tyrant
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Venser, Shaper Savant
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Thassa, God of the Sea
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Omen Hawker
50% of 2 decks +49% synergy
Torrential Gearhulk
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Kuldotha Forgemaster
50% of 2 decks +49% synergy
Azami, Lady of Scrolls
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Stuffy Doll
50% of 2 decks +49% synergy
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50% of 2 decks +49% synergy
Metalwork Colossus
50% of 2 decks +49% synergy
Brash Taunter
50% of 2 decks +48% synergy
Body of Knowledge
50% of 2 decks +48% synergy
Myr Retriever
50% of 2 decks +48% synergy
Goblin Welder
50% of 2 decks +47% synergy
Scrap Trawler
50% of 2 decks +47% synergy
Triskaidekaphile
50% of 2 decks +47% synergy
Myr Battlesphere
50% of 2 decks +47% synergy
Chasm Skulker
50% of 2 decks +46% synergy
Phyrexian Metamorph
50% of 2 decks +43% synergy
Laboratory Maniac
50% of 2 decks +42% synergy
Psychosis Crawler
50% of 2 decks +41% synergy
The Locust God
50% of 2 decks +40% synergy
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50% of 2 decks +39% synergy
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50% of 2 decks +38% synergy
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50% of 2 decks +30% synergy
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50% of 2 decks +20% synergy
Instants
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50% of 2 decks +48% synergy
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50% of 2 decks +48% synergy
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50% of 2 decks +48% synergy
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50% of 2 decks +47% synergy
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50% of 2 decks +45% synergy
Mystic Confluence
50% of 2 decks +45% synergy
Blue Sun's Zenith
50% of 2 decks +45% synergy
Comet Storm
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50% of 2 decks +41% synergy
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50% of 2 decks +4% synergy
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100% of 2 decks +90% synergy
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50% of 2 decks +49% synergy
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50% of 2 decks +50% synergy
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