Veinwitch Coven + Phyrexian Altar + Syr Vondam, Sunstar Exemplar

Veinwitch Coven

Phyrexian Altar

Syr Vondam, Sunstar Exemplar

How it works

1. Activate Phyrexian Altar by sacrificing the one-drop creature, adding .
2. When that creature dies, it and Syr Vondam trigger.
3. Resolve the creature's ability, creating a creature token.
4. Resolve the Syr Vondam ability, gaining 1 life and putting a +1/+1 counter on Syr Vondam.
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.