the front side of Felidar Guardian
the back of a classic MtG card
the front side of Machine God's Effigy
the back of a classic MtG card

Color Identity: W, U

Initial Card State

  1.  Machine God's Effigy in hand.
  2.  Felidar Guardian on the battlefield.

Mana Needed

  1. ({4} magic symbol)   available.

Steps

  1. Cast Machine God's Effigy by paying ({4} magic symbol)  .
  2. Choose to have Machine God's Effigy enter the battlefield as a copy of Felidar Guardian, except it's an artifact.
  3. When Machine God's Effigy enters the battlefield, it triggers, blinking Felidar Guardian.
  4. When Felidar Guardian enters the battlefield, it triggers.
  5. Holding priority, activate Machine God's Effigy by tapping it, adding ({U} magic symbol)  .
  6. Resolve the Felidar Guardian trigger, blinking Machine God's Effigy.
  7. Repeat from step 2.

Results

  1. Infinite blue mana.
  2. Infinite ETB.
  3. Infinite LTB.

Metadata

  1. In 564 decks according to EDHREC.
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