Color Identity: B, R

Prerequisites

  1.  All permanents on the battlefield.
  2. ({1} magic symbol)   available.

Steps

  1. Activate
    Ashnod's Altar
    Ashnod's Altar
    by sacrificing
    Eternal Scourge
    Eternal Scourge
    , adding ({C} magic symbol)  ({C} magic symbol)  .
  2. Planar Void
    Planar Void
    triggers, exiling
    Eternal Scourge
    Eternal Scourge
    from your graveyard.
  3. Cast
    Eternal Scourge
    Eternal Scourge
    for ({3} magic symbol)  .
  4. Prosper, Tome-Bound
    Prosper
    triggers, creating a Treasure token.
  5. Resolve
    Eternal Scourge
    Eternal Scourge
    , allowing it to enter the battlefield.
  6. Activate the Treasure token by tapping and sacrificing it, adding one mana of any color.
  7. Repeat.

Results

  1. Infinite ETB.
  2. Infinite LTB.
  3. Infinite sacrifice triggers.

Metadata

  1. In 23 decks according to EDHREC.
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