How can you create a combo with Fall of Cair Andros, That Which Was Taken, Terror of the Peaks, Phyrexian Altar?
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[START OF COMBO]This combo can be formed with Fall of Cair Andros, That Which Was Taken, Terror of the Peaks, Phyrexian Altar

Color identity: R
Mana cost: {11}{R}
Steps:
  1. Activate That Which Was Taken by paying {4} and tapping it, putting a divinity counter on a creature an opponent controls with toughness six or less.
  2. Activate Fall of Cair Andros by paying {7}{R}, dealing seven damage to the creature that has a divinity counter on it.
  3. Fall of Cair Andros triggers, creating a 0/0 Army and putting at least one +1/+1 counter on it.
  4. When the Army enters the battlefield, Terror of the Peaks triggers.
  5. Holding priority, activate Phyrexian Altar by sacrificing the Army, adding one mana of any color.
  6. Resolve the Terror of the Peaks trigger, dealing 1 damage to the creature with a divinity counter on it.
  7. Repeat from step 3.
  8. Once you have infinite mana, with a Terror of the Peaks trigger on the stack, you may use Fall of Cair Andros' ability to deal infinite damage to the creature with a divinity counter on it, thus causing the Army to have infinite +1/+1 counters on it, which causes Terror of the Peaks to deal infinite damage to any target.[END OF COMBO STEPS]

Result:
  - Infinite colored mana
  - Infinite damage to any target
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite sacrifice triggers[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - An opponent controls a creature with toughness six or less.
  - You do not control an Army.
[END OF COMBO PREREQUISITES]
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