Pattern of Rebirth + The Cauldron of Eternity + Danitha, Benalia's Hope + Phyrexian Altar

Pattern of Rebirth

The Cauldron of Eternity

Danitha, Benalia's Hope

Phyrexian Altar

How it works

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

This clever loop turns Danitha, Benalia's Hope into a self-sustaining sacrifice engine using Phyrexian Altar for infinite colored mana. Whenever Danitha meets her end, Pattern of Rebirth fetches her straight from your library back onto the battlefield, while The Cauldron of Eternity dutifully tucks her into the library upon death so the loop can continue unbroken. As Danitha re-enters, her own entry trigger plucks Pattern of Rebirth right back out of the graveyard to re-enchant her, setting the stage to repeat the entire cycle.