How can you create a combo with Living Death, Eternal Witness, Phyrexian Altar?
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[START OF COMBO]This combo can be formed with Living Death, Eternal Witness, Phyrexian Altar

Color identity: BG
Mana cost: {3}{B}
Steps:
  1. Activate Phyrexian Altar by sacrificing Eternal Witness and all other creatures you control, adding {1} for each creature sacrificed.
  2. Cast Living Death by paying {2}{B}{B}, causing each player to exile all creatures from their graveyard, sacrifice all creatures they control, then return the exiled cards to the battlefield.
  3. When Eternal Witness enters the battlefield, it triggers, returning Living Death from your graveyard to your hand.
  4. Repeat any number of times.
  5. If you have one additional creature, this combo produces infinite colored mana.[END OF COMBO STEPS]

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

Other prerequisites:
  - Living Death must be in your hand
  - Eternal Witness must be on the battlefield
  - Phyrexian Altar must be on the battlefield
  - At least three additional creature cards in your graveyard and/or on the battlefield.
[END OF COMBO PREREQUISITES]
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