Pitiless Plunderer, Altar of Dementia, Persistent Specimen, and Pawn of Ulamog

Prerequisites

• Pitiless Plunderer on the battlefield
• Altar of Dementia on the battlefield
• Persistent Specimen in the graveyard
• Pawn of Ulamog on the battlefield

Steps

1. Activate Altar of Dementia by sacrificing Persistent Specimen
2. When Persistent Specimen dies, Pitiless Plunderer and Pawn of Ulamog trigger
3. Resolve the Pitiless Plunderer trigger, creating a Treasure token
4. Resolve the Pawn of Ulamog trigger, creating a creature token
5. Resolve the Altar of Dementia ability
6. Activate the Treasure by tapping and sacrificing it, adding
7. Activate the creature token by sacrificing it, adding
8. When the creature token dies, Pitiless Plunderer triggers, creating a Treasure token
9. Activate the Treasure by tapping and sacrificing it, adding
10. Activate Persistent Specimen by paying , returning it to the battlefield from your graveyard
11. Repeat

Results

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