the front side of Sai, Master Thopterist
the back of a classic MtG card
the front side of Myr Retriever
the back of a classic MtG card
the front side of Workshop Assistant
the back of a classic MtG card
the front side of Krark-Clan Ironworks
the back of a classic MtG card

Color Identity: U

Initial Card State

  1.  Myr Retriever in your graveyard.
  2.  All other permanents on the battlefield.

Steps

  1. Activate Krark-Clan Ironworks by sacrificing Workshop Assistant, adding one colorless manaone colorless mana.
  2. Workshop Assistant dies, returning Myr Retriever from your graveyard to your hand.
  3. Cast Myr Retriever by paying two generic mana.
  4. Sai triggers, creating a 1/1 Thopter artifact creature token.
  5. Activate Krark-Clan Ironworks twice by sacrificing the Thopter and Myr Retriever, adding one colorless manaone colorless manaone colorless manaone colorless mana.
  6. Myr Retriever dies, returning Workshop Assistant from your graveyard to your hand.
  7. Cast Workshop Assistant by paying three generic mana.
  8. Sai triggers, creating a 1/1 Thopter artifact creature token.
  9. Repeat.

Results

  1. Infinite artifact ETB.
  2. Infinite colorless mana.
  3. Infinite creature tokens.
  4. Infinite death triggers.
  5. Infinite creature ETB.
  6. Infinite creature LTB.
  7. Infinite creature sacrifice triggers.
  8. Infinite storm count.
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