How can you create a combo with Cayth, Famed Mechanist, Phyrexian Altar?
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[START OF COMBO]This combo can be formed with Cayth, Famed Mechanist, Phyrexian Altar

Color identity: URW
Mana cost: 
Steps:
  1. Activate Phyrexian Altar by sacrificing the persist creature, adding one mana of any color.
  2. When the persist creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
  3. When the persist creature enters the battlefield, its fabricate ability triggers, putting a +1/+1 counter on it.
  4. Repeat.[END OF COMBO STEPS]

Result:
  - 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:
  - All permanants must be on the battlefield
  - The persist creature does not have a -1/-1 counter on it.
[END OF COMBO PREREQUISITES]
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