How can you create a combo with Cauldron of Souls, Zealous Conscripts, Verdurous Gearhulk, Phyrexian Altar?
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[START OF COMBO]This combo can be formed with Cauldron of Souls, Zealous Conscripts, Verdurous Gearhulk, Phyrexian Altar

Color identity: RG
Mana cost: 
Steps:
  1. Activate Cauldron of Souls by tapping it, giving Verdurous Gearhulk and Zealous Conscripts persist until end of turn.
  2. Activate Phyrexian Altar by sacrificing Zealous Conscripts, adding one mana of any color.
  3. When Zealous Conscripts dies, its persist ability triggers, returning itself from your graveyard to the battlefield with a -1/-1 counter on it.
  4. When Zealous Conscripts enters the battlefield, it triggers, untapping Cauldron of Souls.
  5. Activate Phyrexian Altar by sacrificing Verdurous Gearhulk, adding one mana of any color.
  6. When Verdurous Gearhulk dies, its persist ability triggers, returning itself from your graveyard to the battlefield with a -1/-1 counter on it.
  7. When Verdurous Gearhulk enters the battlefield, it triggers, putting a +1/+1 counter on itself and Zealous Conscripts, and two +1/+1 counters on any other creature(s) you control.
  8. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite +1/+1 counters on all other creatures you control
  - 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
  - Zealous Conscripts and Verduous Gearhulk do not have a -1/-1 counter on them.
[END OF COMBO PREREQUISITES]
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