The Master, Transcendent, Intruder Alarm, Altar of Dementia, and Mortuary

Prerequisites

• The Master, Transcendent on the battlefield
• Intruder Alarm on the battlefield
• Altar of Dementia on the battlefield
• Mortuary on the battlefield
• The Master does not have summoning sickness
• You control another nontoken creature with power 1 or greater

Steps

1. Activate Altar of Dementia by sacrificing another nontoken creature with power 1 or greater
2. When the creature dies, Mortuary triggers, putting the creature from your graveyard on top of your library
3. Resolve the Altar of Dementia ability, causing you to mill the creature from your library
4. Activate The Master by tapping it, putting the creature from your graveyard onto the battlefield
5. When the creature enters the battlefield, Intruder Alarm triggers, untapping all creatures
6. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite mana creatures you control can produce
• Infinite sacrifice triggers
• Infinite self-mill
• Infinite untap of all creatures