Color Identity: U, B

Prerequisites

  1.  All permanents on the battlefield.

Steps

  1. Activate
    Altar of Dementia
    Altar of Dementia
    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
    Altar of Dementia
    Altar of Dementia
    trigger, causing target player to mill cards equal to
    River Kelpie
    River Kelpie
    's power.
  7. Activate
    Altar of Dementia
    Altar of Dementia
    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
    Altar of Dementia
    Altar of Dementia
    trigger, causing target player to mill cards equal to
    River Kelpie
    River Kelpie
    's power.
  13. Repeat.

Results

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

Metadata

  1. In 655 decks according to EDHREC.
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