the front side of Felidar Guardian
the back of a classic MtG card
the front side of Altar of the Brood
the back of a classic MtG card
the front side of Spark Double
the back of a classic MtG card

Color Identity: W, U

Initial Card State

  1.  Spark Double in hand.
  2.  Felidar Guardian and Altar of the Brood on the battlefield.

Mana Needed

  1. ({3} magic symbol)  ({U} magic symbol)   available.

Steps

  1. Cast Spark Double by paying ({3} magic symbol)  ({U} magic symbol)  .
  2. Spark Double enters the battlefield as a copy of Felidar Guardian, triggering Altar of the Brood and itself.
  3. Resolve the Altar of the Brood trigger, causing each opponent to mill a card.
  4. Resolve the Spark Double's trigger, blinking Felidar Guardian.
  5. Felidar Guardian enters the battlefield, triggering Altar of the Brood and itself.
  6. Resolve the Altar of the Brood trigger, causing each opponent to mill a card.
  7. Resolve the Felidar Guardian's trigger, blinking Spark Double.
  8. Repeat from step 2.

Results

  1. Infinite ETB.
  2. Infinite LTB.
  3. Infinite mill.

Metadata

  1. In 1854 decks according to EDHREC.
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