the front side of Goblin Welder
the back of a classic MtG card
the front side of Retreat to Coralhelm
the back of a classic MtG card
the front side of Darksteel Citadel
the back of a classic MtG card
the front side of Great Furnace
the back of a classic MtG card

Color Identity: U, R

Initial Card State

  1.  Darksteel Citadel in your graveyard.
  2.  All other permanents on the battlefield.

Notable Prerequisites

  1. Goblin Welder does not have summoning sickness.

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 ({C} magic symbol)  .
  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 ({R} magic symbol)  .
  7. Repeat.

Results

  1. Infinite colorless mana.
  2. Infinite landfall triggers.
  3. Infinite red mana.

Metadata

  1. In 82 decks according to EDHREC.
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