Color Identity: U, R

Prerequisites

  1.  
    Myr Battlesphere
    Myr Battlesphere
    in hand.
  2.  
    Barrin, Master Wizard
    Barrin
    and
    Mana Echoes
    Mana Echoes
    on the battlefield.
  3. ({7} magic symbol)   available.

Steps

  1. Cast
    Myr Battlesphere
    Myr Battlesphere
    by paying ({7} magic symbol)  .
  2. Myr Battlesphere
    Myr Battlesphere
    enters the battlefield, triggering itself and
    Mana Echoes
    Mana Echoes
    .
  3. Resolve the
    Myr Battlesphere
    Myr Battlesphere
    trigger, creating four 1/1 Myr creature tokens.
  4. The four Myr tokens enter the battlefield, triggering
    Mana Echoes
    Mana Echoes
    four times.
  5. Resolve all
    Mana Echoes
    Mana Echoes
    triggers, adding at least 25 ({C} magic symbol)  .
  6. Activate
    Barrin, Master Wizard
    Barrin
    by paying ({2} magic symbol)   and sacrificing a Myr token, returning
    Myr Battlesphere
    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 ETB.
  5. Infinite LTB.
  6. Infinite sacrifice triggers.
  7. Infinite storm count.

Metadata

  1. In 3 decks according to EDHREC.
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