Veinwitch Coven + Moldervine Reclamation + Phyrexian Altar

Veinwitch Coven

Moldervine Reclamation

Phyrexian Altar

How it works

1. Activate Phyrexian Altar by sacrificing the one-drop creature, adding .
2. When that creature dies, it and Moldervine Reclamation trigger.
3. Resolve the creature's ability, creating a creature token.
4. Resolve the Moldervine Reclamation ability, gaining 1 life and drawing a card.
5. When you gain life, Veinwitch Coven triggers, causing you to pay to return the one-drop creature from your graveyard to your hand.
6. Activate Phyrexian Altar by sacrificing the token creature, adding one colored mana.
7. Cast the creature by paying one mana.
8. Repeat.