Olivia, Mobilized for War + Altar of Dementia + Tresserhorn's Lord, Returned

Olivia, Mobilized for War

Altar of Dementia

Tresserhorn's Lord, Returned

How it works

1. Activate Altar of Dementia by sacrificing the persist creature.
2. When the persist creature dies, it and Tresserhorn's Lord trigger.
3. Resolve the Tresserhorn's Lord trigger, causing you to draw a card.
4. Resolve the persist creature's trigger, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
5. When the persist creature enters the battlefield, Olivia triggers, putting a +1/+1 counter on the persist creature and causing you to discard a card.
6. Resolve the Altar of Dementia ability.
7. Repeat.

This loop uses a persist creature's ability to repeatedly return from the graveyard, cancelling out its -1/-1 counter each time it re-enters thanks to the triggered ability on Olivia, Mobilized for War. With Olivia, Mobilized for War providing a +1/+1 counter on entry, the persist creature’s counters neutralize one another indefinitely while you churn through your deck using Tresserhorn's Lord, Returned. As you cycle the creature through Altar of Dementia to mill your opponents and draw cards off Tresserhorn's Lord, Returned, every single sacrifice triggers the card draw engine and fuels the Altar.