Veinwitch Coven + Carnival of Souls + Auriok Champion

Veinwitch Coven

Carnival of Souls

Auriok Champion

How it works

1. Cast the creature card from your hand for 0. The creature enters, then immediately dies as a state-based action due to having 0 toughness.
2. When the creature enters, Carnival of Souls and Auriok Champion trigger.
3. Resolve the Carnival of Souls ability, adding and losing 1 life.
4. Resolve the Auriok Champion ability, gaining at least 1 life.
5. When you gain life, Veinwitch Coven triggers, causing you to pay to return the creature card from your graveyard to your hand.
6. Repeat.