Rubinia Soulsinger + Requiem Angel + Intruder Alarm + Altar of Dementia

Prerequisites

• Rubinia Soulsinger does not have summoning sickness.

Steps

1. 1Activate 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. 2Activate Altar of Dementia by sacrificing the creature.
3. 3When the creature dies, Requiem Angel triggers, creating a 1/1 Spirit creature token.
4. 4When the Spirit enters the battlefield, Intruder Alarm triggers, untapping all creatures.
5. 5Resolve the Altar of Dementia ability from step 2, causing target player to mill cards equal to the sacrificed creature's power.
6. 6Repeat as desired.
7. 7You 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.

Effects

• Gain control of any creatures that enters the battlefield
• Lock