Six + Phyrexian Altar + Circle of the Land Druid + Quintorius, History Chaser

Six

Phyrexian Altar

Circle of the Land Druid

Quintorius, History Chaser

How it works

1. Cast Circle of the Land Druid from your graveyard for its retrace cost by paying 1 and discarding a land card.
2. Quintorius, History Chaser triggers, creating a creature token.
3. When Circle of the Land Druid enters the battlefield, its first ability triggers, causing you to mill four cards.
4. Activate Phyrexian Altar twice by sacrificing the creature token and Circle of the Land Druid, adding 1.
5. When Circle of the Land Druid dies, its second ability triggers, returning a land card from your graveyard to your hand.
6. Quintorius, History Chaser triggers, creating a creature token.
7. Repeat.

This loop transforms your graveyard into an engine of endless creation, powered by Six granting every nonland permanent card in your graveyard retrace so you can repeatedly cast Circle of the Land Druid. Each time you replay the Druid, its entry triggers self-mill to feed your options while Quintorius, History Chaser rewards you with a Spirit token whenever cards leave the graveyard. You then feed those creatures into Phyrexian Altar to generate the exact mana needed for the retrace cost, while the Druid's death trigger ensures a land card always returns to your hand to fuel the next iteration.