How can you create a combo with Mikaeus, the Unhallowed, Cauldron of Souls, Intruder Alarm, Animate Artifact, Phyrexian Altar?
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[START OF COMBO]This combo can be formed with Mikaeus, the Unhallowed, Cauldron of Souls, Intruder Alarm, Animate Artifact, Phyrexian Altar

Color identity: UB
Mana cost: 
Steps:
  1. Activate Phyrexian Altar by sacrificing the additional nontoken non-Human creature, adding one mana of any color.
  2. When the creature dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
  3. When the creature enters the battlefield, Intruder Alarm triggers, untapping all creatures.
  4. Activate Cauldron of Souls by tapping it, giving the creature persist until end of turn.
  5. Activate Phyrexian Altar by sacrificing the creature, adding one mana of any color.
  6. When the creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
  7. When the creature enters the battlefield, Intruder Alarm triggers, untapping all creatures.
  8. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite colored mana
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite mana creatures you control can produce
  - Infinite sacrifice triggers
  - Infinite untap of all creatures[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - You control at least one additional nontoken non-Human creature.
  - Animate Artifact attached to Cauldron of Souls.
  - Cauldron of Souls does not have summoning sickness.
[END OF COMBO PREREQUISITES]
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