Pattern of Rebirth, Academy Rector, Splinter Twin, Deceiver Exarch, and Altar of Dementia

Prerequisites

• Academy Rector, Altar of Dementia, and Pattern of Rebirth on the battlefield
• Splinter Twin and Deceiver Exarch in library
• Pattern of Rebirth attached to Academy Rector
• You have a way to give Deceiver Exarch haste

Steps

1. Activate Altar of Dementia by sacrificing Academy Rector
2. Academy Rector and Pattern of Rebirth trigger
3. Choose to resolve Pattern's trigger first, putting Deceiver Exarch from your library onto the battlefield
4. Deceiver Exarch enters the battlefield, triggering itself, untapping any permanent you control
5. Resolve Academy Rector's trigger, putting Splinter Twin from your library onto the battlefield, attached to Deceiver Exarch
6. Resolve Altar of Dementia's ability, milling any player one card
7. Give Deceiver Exarch haste
8. Activate Deceiver Exarch's ability from Splinter Twin by tapping it, creating a token copy of itself with haste
9. The Deceiver Exarch token enters the battlefield, triggering itself, untapping the nontoken Deceiver Exarch
10. Repeat steps 8 and 9 any number of times
11. Once you have infinite creature tokens, you may activate Altar of Dementia any number of times

Results

• Infinite mill
• Infinite self-mill
• Infinite ETB
• Infinite LTB
• Infinite death triggers
• Infinite creatures tokens with haste
• Infinite sacrifice triggers