Necrogenesis + Void Attendant + Phyrexian Altar + Pitiless Plunderer

Necrogenesis

Void Attendant

Phyrexian Altar

Pitiless Plunderer

How it works

1. Activate Necrogenesis by paying 2, exling a creature card from an opponent's graveyard and creating a 1/1 Saproling creature token.
2. Activate Phyrexian Altar by sacrificing the Saproling, adding 1.
3. The Saproling dies, triggering Pitiless Plunderer, creating a Treasure token.
4. Activate the Treasure token by tapping and sacrificing it, adding .
5. Activate Void Attendant by paying 1 and putting a card from an opponent's exile into their graveyard, creating a 1/1 Eldrazi Scion creature token.
6. Activate Phyrexian Altar by sacrificing the Eldrazi Scion, adding 1.
7. The Eldrazi Scion dies, triggering Pitiless Plunderer, creating a Treasure token.
8. Activate the Treasure token by tapping and sacrificing it, adding 1.
9. Repeat.