The Master, Transcendent, Thornbite Staff, Altar of Dementia, and Mortuary

Prerequisites

• The Master, Transcendent on the battlefield
• Thornbite Staff on the battlefield
• Altar of Dementia on the battlefield
• Mortuary on the battlefield
• Thornbite Staff attached to The Master
• The Master does not have summoning sickness
• You control another creature with power 1 or greater

Steps

1. Activate Altar of Dementia by sacrificing any other creature with power 1 or greater
2. When the creature dies, Mortuary and The Master trigger
3. Resolve the Mortuary trigger, putting the creature from your graveyard on top of your library
4. Resolve the Master trigger, untapping it
5. Resolve the Altar of Dementia ability, causing you to mill the creature from your library
6. Activate The Master by tapping it, putting the creature from your graveyard onto the battlefield
7. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite self-mill