Shepherd of the Cosmos + Ashnod's Altar + Necrogen Communion

Shepherd of the Cosmos

Ashnod's Altar

Necrogen Communion

How it works

1. Activate Ashnod's Altar by sacrificing Shepherd of the Cosmos, adding CC.
2. When Shepherd of the Cosmos dies, Necrogen Communion triggers, returning Shepherd of the Cosmos from your graveyard to the battlefield.
3. When Shepherd of the Cosmos enters the battlefield, it triggers, returning Necrogen Communion from your graveyard to the battlefield attached to Shepherd of the Cosmos.
4. Repeat.

This delightful loop creates an endless cycle of sacrifice and rebirth by letting Shepherd of the Cosmos and Necrogen Communion endlessly trigger one another. When you feed Shepherd of the Cosmos to Ashnod's Altar for a pair of colorless mana, Necrogen Communion's death trigger immediately brings the creature right back to the battlefield. That returning entry then triggers Shepherd of the Cosmos to pluck Necrogen Communion out of the graveyard and attach it right back to the angel, perfectly resetting the loop for infinite sacrifices, death triggers, and colorless mana.