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

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 Altar of Dementia by sacrificing Corridor Monitor.
  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 Altar of Dementia by sacrificing Ridgescale Tusker.
  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. Resolve both Altar of Dementia abilities, causing target player to mill cards equal to Corridor Monitor and Ridgescale Tusker's power.
  9. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite +1/+1 counters on all other creatures you control
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite mill
  - Infinite sacrifice triggers
  - Infinite self-mill[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
[END OF COMBO PREREQUISITES]
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