How can you create a combo with Mairsil, the Pretender, Carnifex Demon, Cauldron of Souls, Blood Pet, Anger?
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[START OF COMBO]This combo can be formed with Mairsil, the Pretender, Carnifex Demon, Cauldron of Souls, Blood Pet, Anger

Color identity: UBR
Mana cost: 
Steps:
  1. Activate Mairsil using Cauldron of Souls' ability by tapping it, giving itself persist until end of turn.
  2. Activate Mairsil using Blood Pet's ability by sacrificing it, adding {B}.
  3. When Mairsil dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
  4. Activate Mairsil using Carnifex Demon's ability by paying {B} and removing a -1/-1 counter from it, putting a -1/-1 counter on each other creature.
  5. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite sacrifice triggers[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Mairsil, the Pretender must be on the battlefield
  - Carnifex Demon must be exiled
  - Cauldron of Souls must be exiled
  - Blood Pet must be exiled
  - Anger must be in the graveyard
  - You control a Mountain.
[END OF COMBO PREREQUISITES]
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