Necrogenesis + Void Attendant + Phyrexian Altar + Mondrak, Glory Dominus

Necrogenesis

Void Attendant

Phyrexian Altar

Mondrak, Glory Dominus

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 clever loop turns graveyard hate into a self-sustaining engine by cycling cards back and forth between the graveyard and exile. Necrogenesis starts the dance by turning opponent's fallen creatures into Saprolings, whose sacrifice to Phyrexian Altar provides the exact mana needed to feed Void Attendant. Void Attendant then plucks those exiled cards right back into the graveyard while spawning Eldrazi Scions, which are promptly sacrificed to the Altar to keep the monetary flow going. Meanwhile, Mondrak, Glory Dominus doubles every single token created along the way, generating a surplus of resources that yields infinite death, entry, and sacrifice triggers.