How can you create a combo with Cauldron of Souls, Corridor Monitor, Ridgescale Tusker, Phyrexian Altar?
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[START OF COMBO]This combo can be formed with Cauldron of Souls, Corridor Monitor, Ridgescale Tusker, Phyrexian Altar

Color identity: GU
Mana cost: 
Steps:
  1. Activate Cauldron of Souls by tapping it, giving Ridgescale Tusker and Corridor Monitor persist until end of turn.
  2. Activate Phyrexian Altar by sacrificing Corridor Monitor, adding one mana of any color.
  3. Corridor Monitor dies, triggering its persist ability, returning itself from your graveyard to the battlefield with a -1/-1 counter on it.
  4. Corridor Monitor enters the battlefield, untapping Cauldron of Souls.
  5. Activate Phyrexian Altar by sacrificing Ridgescale Tusker, adding one mana of any color.
  6. Ridgescale Tusker dies, triggering its persist ability, returning itself from your graveyard to the battlefield with a -1/-1 counter on it.
  7. Ridgescale Tusker enters the battlefield, putting a +1/+1 counter on each creature 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
[END OF COMBO PREREQUISITES]
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