Color Identity: B

Prerequisites

  1.  
    Walking Ballista
    Walking Ballista
    in exile (exiled by
    Agatha's Soul Cauldron
    Agatha's Soul Cauldron
    ).
  2.  
    Sengir, the Dark Baron
    Sengir
    and
    Agatha's Soul Cauldron
    Agatha's Soul Cauldron
    on the battlefield.
  3. Sengir, the Dark Baron
    Sengir
    has at least one +1/+1 counter on it.
  4. You have a way to give
    Sengir, the Dark Baron
    Sengir
    deathtouch.

Steps

  1. Give
    Sengir, the Dark Baron
    Sengir
    deathtouch, if needed.
  2. Activate
    Sengir, the Dark Baron
    Sengir
    using
    Walking Ballista
    Walking Ballista
    's second ability by removing a +1/+1 counter from it, dealing 1 damage to any creature an opponent controls, and killing it due to
    Sengir, the Dark Baron
    Sengir
    's deathtouch.
  3. When the creature dies,
    Sengir, the Dark Baron
    Sengir
    's first ability triggers, putting two +1/+1 counters on it.
  4. Repeat from step 2 as desired.

Notes

  1. If you have a way to give
    Sengir, the Dark Baron
    Sengir
    deathtouch indefinitely, you can repeat this loop whenever a creature enters the battlefield under an opponent's control.

Results

  1. Destroy all creatures that enter the battlefield under an opponent's control.
  2. Destroy all creatures opponents control.

Metadata

  1. In 3 decks according to EDHREC.
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