How can you create a combo with Missy, Skirk Alarmist, Intruder Alarm, Altar of Dementia?
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[START OF COMBO]This combo can be formed with Missy, Skirk Alarmist, Intruder Alarm, Altar of Dementia

Color identity: UBR
Mana cost: 
Steps:
  1. Activate Altar of Dementia by sacrificing another nontoken nonartifact creature When the creature dies, Missy's first ability triggers, returning the creature from your graveyard to the battlefield face down as a 2/2 Cyberman artifact creature.
  2. When the creature enters the battlefield, Intruder Alarm triggers, untapping all creatures.
  3. Resolve the Altar of Dementia ability from step 1, causing target player to mill cards equal to the sacrificed creature's power.
  4. Activate Skirk Alarmist by tapping it, turning the creature face up.
  5. Repeat.[END OF COMBO STEPS]

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

Other prerequisites:
  - All permanants must be on the battlefield
  - You control another nontoken nonartifact creature.
[END OF COMBO PREREQUISITES]
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