Color Identity: U

Prerequisites

  1.  
    Darksteel Citadel
    Darksteel Citadel     in exile (exiled by
    Prototype Portal
    Prototype Portal    ).
  2.  All other permanents on the battlefield.
  3. Ensoul Artifact
    Ensoul Artifact     attached to
    Prototype Portal
    Prototype Portal    .
  4. Prototype Portal
    Prototype Portal     does not have summoning sickness.

Steps

  1. Activate
    Prototype Portal
    Prototype Portal     by tapping it, creating a token copy of
    Darksteel Citadel
    Darksteel Citadel    .
  2. When the
    Darksteel Citadel
    Darksteel Citadel     token enters the battlefield,
    Retreat to Coralhelm
    Retreat to Coralhelm     triggers, untapping
    Prototype Portal
    Prototype Portal    .
  3. Repeat.

Results

  1. Infinite colorless mana.
  2. Infinite
    Darksteel Citadel
    Darksteel Citadel     tokens.
  3. Infinite landfall triggers.

Metadata

  1. In 4 decks according to EDHREC.
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