Necrogenesis + Void Attendant + Phyrexian Altar + Anointed Procession

Necrogenesis

Void Attendant

Phyrexian Altar

Anointed Procession

How it works

1. Activate Necrogenesis by paying 2, exling a creature card from an opponent's graveyard and creating two 1/1 Saproling creature tokens.
2. Activate Phyrexian Altar twice by sacrificing the Saprolings, adding 1.
3. Activate Void Attendant by paying 1 and putting a card from an opponent's exile into their graveyard, creating two 1/1 Eldrazi Scion creature tokens.
4. Activate Phyrexian Altar twice by sacrificing the Eldrazi Scions, adding 2.
5. Repeat.

This looping engine turns graveyard interaction into a self-sustaining manufacturing line, legal in formats like Commander, Legacy, Oathbreaker, and Vintage. Necrogenesis and Void Attendant form a clever tag-team that continuously shuffles a creature card back and forth between an opponent's graveyard and exile, while Anointed Procession doubles the token yield of every single creation step to generate a surplus. By feeding those bonus tokens straight into Phyrexian Altar, you easily recoup the mana needed to keep the cycle spinning indefinitely. The result is an endless cascade of enters-the-battlefield, leaves-the-battlefield, death, and sacrifice triggers ready to overwhelm the table.