Color Identity: B, R

Prerequisites

  1.  All permanents on the battlefield.

Steps

  1. Activate
    Kiki-Jiki, Mirror Breaker
    Kiki-Jiki
    by tapping it, creating a token copy of
    Prowling Geistcatcher
    Prowling Geistcatcher
    with haste.
  2. Activate
    Phyrexian Altar
    Phyrexian Altar
    by sacrificing
    Kiki-Jiki, Mirror Breaker
    Kiki-Jiki
    , adding one mana of any color.
  3. When
    Kiki-Jiki, Mirror Breaker
    Kiki-Jiki
    dies, the nontoken and token
    Prowling Geistcatcher
    Prowling Geistcatcher
    's first abilities trigger.
  4. Resolve the token
    Prowling Geistcatcher
    Prowling Geistcatcher
    's trigger, exiling
    Kiki-Jiki, Mirror Breaker
    Kiki-Jiki
    from your graveyard.
  5. Resolve the nontoken
    Prowling Geistcatcher
    Prowling Geistcatcher
    's trigger, doing nothing.
  6. Activate
    Phyrexian Altar
    Phyrexian Altar
    by sacrificing the
    Prowling Geistcatcher
    Prowling Geistcatcher
    token, adding one mana of any color.
  7. When the token
    Prowling Geistcatcher
    Prowling Geistcatcher
    dies, its second ability and the nontoken
    Prowling Geistcatcher
    Prowling Geistcatcher
    's first ability triggers.
  8. Resolve the nontoken
    Prowling Geistcatcher
    Prowling Geistcatcher
    trigger, putting a +1/+1 counter on it.
  9. Resolve the token
    Prowling Geistcatcher
    Prowling Geistcatcher
    trigger, returning
    Kiki-Jiki, Mirror Breaker
    Kiki-Jiki
    from exile to the battlefield.
  10. Repeat.

Results

  1. Infinite +1/+1 counters on
    Prowling Geistcatcher
    Prowling Geistcatcher
    .
  2. Infinite colored mana.
  3. Infinite death triggers.
  4. Infinite ETB.
  5. Infinite LTB.
  6. Infinite sacrifice triggers.

Metadata

  1. In 66 decks according to EDHREC.
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