the front side of Agent Frank Horrigan
the back of a classic MtG card
the front side of Cryptic Trilobite
the back of a classic MtG card
the front side of Emiel the Blessed
the back of a classic MtG card

Color Identity: W, B, G

Initial Card State

  1.  All permanents on the battlefield.

Notable Prerequisites

  1. Cryptic Trilobite has at least one +1/+1 counter on it.

Mana Needed

  1. ({3} magic symbol)   available.

Steps

  1. Activate Emiel the Blessed by paying ({3} magic symbol)  , blinking Agent Frank Horrigan.
  2. When Agent Frank Horrigan enters the battlefield, it triggers, causing you to put two +1/+1 counters on Cryptic Trilobite.
  3. Activate Crystalline Crawler's first ability twice by removing two +1/+1 counters from it, adding ({C} magic symbol)  ({C} magic symbol)  ({C} magic symbol)  ({C} magic symbol)   that can only be spent to activate abilities.
  4. Repeat.

Results

  1. Infinite +1/+1 counters on a creature.
  2. Infinite blinking.
  3. Infinite colorless mana that can only be spent to activate abilities.
  4. Infinite ETB.
  5. Infinite LTB.
  6. Infinite proliferate.

Metadata

  1. In 2 decks according to EDHREC.
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