How can you create a combo with Rubinia Soulsinger, Requiem Angel, Intruder Alarm, Altar of Dementia?
user
[START OF COMBO]This combo can be formed with Rubinia Soulsinger, Requiem Angel, Intruder Alarm, Altar of Dementia

Color identity: GWU
Mana cost: 
Steps:
  1. Activate Rubinia Soulsinger by tapping it, causing you to gain control of target non-Spirit creature an opponent controls for as long as Rubinia Soulsinger is tapped.
  2. Activate Altar of Dementia by sacrificing the creature.
  3. When the creature dies, Requiem Angel triggers, creating a 1/1 Spirit creature token.
  4. When the Spirit enters the battlefield, Intruder Alarm triggers, untapping all creatures.
  5. Resolve the Altar of Dementia ability from step 2, causing target player to mill cards equal to the sacrificed creature's power.
  6. Repeat as desired.
  7. You may also repeat this combo whenever a creature enters the battlefield under an opponent's control, and retain control of that creature until Rubinia Soulsinger would become untapped.[END OF COMBO STEPS]

Result:
  - Gain control of any creature that enters the battlefield[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Rubinia Soulsinger does not have summoning sickness.
[END OF COMBO PREREQUISITES]
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