the front side of Barrin, Master Wizard
the back of a classic MtG card
the front side of Myr Battlesphere
the back of a classic MtG card
the front side of Mana Echoes
the back of a classic MtG card

Color Identity: U, R

Initial Card State

  1.  Myr Battlesphere in hand.
  2.  Barrin and Mana Echoes on the battlefield.

Mana Needed

  1. seven generic mana available.

Steps

  1. Cast Myr Battlesphere by paying seven generic mana.
  2. Myr Battlesphere enters the battlefield, triggering itself and Mana Echoes.
  3. Resolve the Myr Battlesphere trigger, creating four 1/1 Myr creature tokens.
  4. The four Myr tokens enter the battlefield, triggering Mana Echoes four times.
  5. Resolve all Mana Echoes triggers, adding at least 25 one colorless mana.
  6. Activate Barrin by paying two generic mana and sacrificing a Myr token, returning Myr Battlesphere from the battlefield to your hand.
  7. Repeat.

Results

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