Color Identity: U, B

Prerequisites

  1.  
    Cavern Harpy
    Cavern Harpy     in hand.
  2.  All other permanents on the battlefield.
  3. Crystalline Crawler
    Crystalline Crawler     has at least one +1/+1 counter on it.
  4. Pentad Prism
    Pentad Prism     has at least one charge counter on it.
  5. ({U} magic symbol)  ({B} magic symbol)   available.

Steps

  1. Cast
    Cavern Harpy
    Cavern Harpy     by paying ({U} magic symbol)  ({B} magic symbol)  .
  2. Inexorable Tide
    Inexorable Tide     triggers, putting a +1/+1 counter on
    Crystalline Crawler
    Crystalline Crawler     and a charge counter on
    Pentad Prism
    Pentad Prism    .
  3. When
    Cavern Harpy
    Cavern Harpy     enters the battlefield, it triggers, returning itself from the battlefield to your hand.
  4. Activate
    Pentad Prism
    Pentad Prism     by removing a charge counter from it, adding ({B} magic symbol)  .
  5. Activate
    Crystalline Crawler
    Crystalline Crawler    's first ability by removing a +1/+1 counter from it, adding ({U} magic symbol)  .
  6. Repeat.

Results

  1. Infinite ETB.
  2. Infinite LTB.
  3. Infinite proliferate.
  4. Infinite storm count.

Metadata

  1. In 0 decks according to EDHREC.
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