Color Identity: U, B

Prerequisites

  1.  All permanents on the battlefield.

Steps

  1. Activate
    Spawning Pit
    Spawning Pit
    by sacrificing
    River Kelpie
    River Kelpie
    .
  2. River Kelpie
    River Kelpie
    's persist and undying abilities trigger.
  3. Resolve the persist trigger, returning
    River Kelpie
    River Kelpie
    from your graveyard to the battlefield with a -1/-1 counter on it.
  4. River Kelpie
    River Kelpie
    enters the battlefield, causing you to draw.
  5. The undying trigger fails to resolve because
    River Kelpie
    River Kelpie
    is not in your graveyard.
  6. Resolve the
    Spawning Pit
    Spawning Pit
    trigger, putting a charge counter on it.
  7. Activate
    Spawning Pit
    Spawning Pit
    by sacrificing
    River Kelpie
    River Kelpie
    .
  8. River Kelpie
    River Kelpie
    's undying and persist abilities trigger.
  9. Resolve the undying trigger, returning
    River Kelpie
    River Kelpie
    from your graveyard to the battlefield with a +1/+1 counter on it.
  10. River Kelpie
    River Kelpie
    enters the battlefield, causing you to draw a card.
  11. The persist trigger fails to resolve because
    River Kelpie
    River Kelpie
    is not in your graveyard.
  12. Resolve the
    Spawning Pit
    Spawning Pit
    trigger, putting a charge counter on it.
  13. Repeat.

Results

  1. Infinite card draw.
  2. Near-infinite death triggers.
  3. Near-infinite ETB.
  4. Near-infinite LTB.
  5. Near-infinite sacrifice triggers.

Metadata

  1. In 85 decks according to EDHREC.
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