How can you create a combo with The Jolly Balloon Man, Agatha's Soul Cauldron, Midnight Guard, Phyrexian Altar?
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[START OF COMBO]This combo can be formed with The Jolly Balloon Man, Agatha's Soul Cauldron, Midnight Guard, Phyrexian Altar

Color identity: RW
Mana cost: {1}
Steps:
  1. Activate Midnight Guard using The Jolly Balloon Man's ability by paying {1} and tapping it, creating a token copy of another nonlegendary creature you control that is a 1/1 Balloon with flying and haste in addition to its other types.
  2. When the creature token enters the battlefield, Midnight Guard triggers, untapping it.
  3. Activate Phyrexian Altar by sacrificing the creature token, adding {1}.
  4. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite leaves the battlefield
  - Infinite enters the battlefield
  - Infinite sacrifice triggers
  - Infinite death triggers[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - The Jolly Balloon Man must be exiled
  - Agatha's Soul Cauldron must be on the battlefield
  - Midnight Guard must be on the battlefield
  - Phyrexian Altar must be on the battlefield
  - Midnight Guard has at least one +1/+1 counter on it.
  - Midnight Guard does not have summoning sickness.
  - You control at least one additional nonlegendary creature.
[END OF COMBO PREREQUISITES]
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