The Master, Transcendent, Intruder Alarm, Altar of Dementia, and Golgari Thug

Prerequisites

• The Master, Transcendent on the battlefield
• Intruder Alarm on the battlefield
• Altar of Dementia on the battlefield
• Golgari Thug on the battlefield
• The Master does not have summoning sickness

Steps

1. Activate Altar of Dementia by sacrificing Golgari Thug
2. When Golgari Thug dies, it triggers, putting itself from your graveyard on top of your library
3. Resolve the Altar of Dementia ability, causing you to mill Golgari Thug from your library
4. Activate The Master by tapping it, putting Golgari Thug from your graveyard onto the battlefield
5. When Golgari Thug 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