Pattern of Rebirth + The Cauldron of Eternity + Boonweaver Giant + Phyrexian Altar

Pattern of Rebirth

The Cauldron of Eternity

Boonweaver Giant

Phyrexian Altar

How it works

1. Activate Phyrexian Altar by sacrificing Boonweaver Giant, adding one mana of any color.
2. When Boonweaver Giant dies, The Cauldron of Eternity and Pattern of Rebirth trigger.
3. Resolve the Cauldron of Eternity trigger, putting Boonweaver Giant on the bottom of your library from your graveyard.
4. Resolve the Pattern of Rebirth trigger, putting Boonweaver Giant from your library onto the battlefield.
5. When Boonweaver Giant enters the battlefield, it triggers, returning Pattern of Rebirth from your graveyard to the battlefield attached to Boonweaver Giant.
6. Repeat.

This ingenious loop turns a single giant into a self-sustaining engine of creation and sacrifice, fueled by Phyrexian Altar to generate infinite colored mana, death triggers, and entry effects. When you sacrifice Boonweaver Giant to the Altar, its demise triggers both Pattern of Rebirth to tutor it straight back onto the battlefield and The Cauldron of Eternity to seamlessly cycle it from the graveyard back to the bottom of your library. As the giant re-enters, its own ability immediately reaches into your library or graveyard to reattach Pattern of Rebirth, leaving you ready to repeat the entire cycle endlessly.